Mercurial > hg > truffle
annotate src/share/vm/code/nmethod.cpp @ 10031:ebb32c4589f3
Force GC to process graal_installed_code references during marking (GRAAL-257)
| author | Christos Kotselidis <christos.kotselidis@oracle.com> |
|---|---|
| date | Tue, 11 Jun 2013 19:59:52 +0200 |
| parents | 07e76b6fcc38 |
| children | 4a7dc38ae96b |
| rev | line source |
|---|---|
| 9707 | 1 /* |
| 2 * Copyright (c) 1997, 2012, Oracle and/or its affiliates. All rights reserved. | |
| 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. | |
| 4 * | |
| 5 * This code is free software; you can redistribute it and/or modify it | |
| 6 * under the terms of the GNU General Public License version 2 only, as | |
| 7 * published by the Free Software Foundation. | |
| 8 * | |
| 9 * This code is distributed in the hope that it will be useful, but WITHOUT | |
| 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
| 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
| 12 * version 2 for more details (a copy is included in the LICENSE file that | |
| 13 * accompanied this code). | |
| 14 * | |
| 15 * You should have received a copy of the GNU General Public License version | |
| 16 * 2 along with this work; if not, write to the Free Software Foundation, | |
| 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. | |
| 18 * | |
| 19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA | |
| 20 * or visit www.oracle.com if you need additional information or have any | |
| 21 * questions. | |
| 22 * | |
| 23 */ | |
| 24 | |
| 25 #include "precompiled.hpp" | |
| 26 #include "code/codeCache.hpp" | |
| 27 #include "code/compiledIC.hpp" | |
| 28 #include "code/dependencies.hpp" | |
| 29 #include "code/nmethod.hpp" | |
| 30 #include "code/scopeDesc.hpp" | |
| 31 #include "compiler/abstractCompiler.hpp" | |
| 32 #include "compiler/compileBroker.hpp" | |
| 33 #include "compiler/compileLog.hpp" | |
| 34 #include "compiler/compilerOracle.hpp" | |
| 35 #include "compiler/disassembler.hpp" | |
| 36 #include "interpreter/bytecode.hpp" | |
| 37 #include "oops/methodData.hpp" | |
| 38 #include "prims/jvmtiRedefineClassesTrace.hpp" | |
| 39 #include "prims/jvmtiImpl.hpp" | |
| 40 #include "runtime/sharedRuntime.hpp" | |
| 41 #include "runtime/sweeper.hpp" | |
| 42 #include "utilities/dtrace.hpp" | |
| 43 #include "utilities/events.hpp" | |
| 44 #include "utilities/xmlstream.hpp" | |
| 45 #ifdef SHARK | |
| 46 #include "shark/sharkCompiler.hpp" | |
| 47 #endif | |
| 48 #ifdef GRAAL | |
| 49 #include "graal/graalJavaAccess.hpp" | |
| 50 #endif | |
| 51 | |
| 52 #ifdef DTRACE_ENABLED | |
| 53 | |
| 54 // Only bother with this argument setup if dtrace is available | |
| 55 | |
| 56 #ifndef USDT2 | |
| 57 HS_DTRACE_PROBE_DECL8(hotspot, compiled__method__load, | |
| 58 const char*, int, const char*, int, const char*, int, void*, size_t); | |
| 59 | |
| 60 HS_DTRACE_PROBE_DECL6(hotspot, compiled__method__unload, | |
| 61 char*, int, char*, int, char*, int); | |
| 62 | |
| 63 #define DTRACE_METHOD_UNLOAD_PROBE(method) \ | |
| 64 { \ | |
| 65 Method* m = (method); \ | |
| 66 if (m != NULL) { \ | |
| 67 Symbol* klass_name = m->klass_name(); \ | |
| 68 Symbol* name = m->name(); \ | |
| 69 Symbol* signature = m->signature(); \ | |
| 70 HS_DTRACE_PROBE6(hotspot, compiled__method__unload, \ | |
| 71 klass_name->bytes(), klass_name->utf8_length(), \ | |
| 72 name->bytes(), name->utf8_length(), \ | |
| 73 signature->bytes(), signature->utf8_length()); \ | |
| 74 } \ | |
| 75 } | |
| 76 #else /* USDT2 */ | |
| 77 #define DTRACE_METHOD_UNLOAD_PROBE(method) \ | |
| 78 { \ | |
| 79 Method* m = (method); \ | |
| 80 if (m != NULL) { \ | |
| 81 Symbol* klass_name = m->klass_name(); \ | |
| 82 Symbol* name = m->name(); \ | |
| 83 Symbol* signature = m->signature(); \ | |
| 84 HOTSPOT_COMPILED_METHOD_UNLOAD( \ | |
| 85 (char *) klass_name->bytes(), klass_name->utf8_length(), \ | |
| 86 (char *) name->bytes(), name->utf8_length(), \ | |
| 87 (char *) signature->bytes(), signature->utf8_length()); \ | |
| 88 } \ | |
| 89 } | |
| 90 #endif /* USDT2 */ | |
| 91 | |
| 92 #else // ndef DTRACE_ENABLED | |
| 93 | |
| 94 #define DTRACE_METHOD_UNLOAD_PROBE(method) | |
| 95 | |
| 96 #endif | |
| 97 | |
| 98 bool nmethod::is_compiled_by_c1() const { | |
| 99 if (compiler() == NULL || method() == NULL) return false; // can happen during debug printing | |
| 100 if (is_native_method()) return false; | |
| 101 return compiler()->is_c1(); | |
| 102 } | |
| 103 bool nmethod::is_compiled_by_graal() const { | |
| 104 if (compiler() == NULL || method() == NULL) return false; // can happen during debug printing | |
| 105 if (is_native_method()) return false; | |
| 106 return compiler()->is_graal(); | |
| 107 } | |
| 108 bool nmethod::is_compiled_by_c2() const { | |
| 109 if (compiler() == NULL || method() == NULL) return false; // can happen during debug printing | |
| 110 if (is_native_method()) return false; | |
| 111 return compiler()->is_c2(); | |
| 112 } | |
| 113 bool nmethod::is_compiled_by_shark() const { | |
| 114 if (is_native_method()) return false; | |
| 115 assert(compiler() != NULL, "must be"); | |
| 116 return compiler()->is_shark(); | |
| 117 } | |
| 118 | |
| 119 | |
| 120 | |
| 121 //--------------------------------------------------------------------------------- | |
| 122 // NMethod statistics | |
| 123 // They are printed under various flags, including: | |
| 124 // PrintC1Statistics, PrintOptoStatistics, LogVMOutput, and LogCompilation. | |
| 125 // (In the latter two cases, they like other stats are printed to the log only.) | |
| 126 | |
| 127 // These variables are put into one block to reduce relocations | |
| 128 // and make it simpler to print from the debugger. | |
| 129 static | |
| 130 struct nmethod_stats_struct { | |
| 131 int nmethod_count; | |
| 132 int total_size; | |
| 133 int relocation_size; | |
| 134 int consts_size; | |
| 135 int insts_size; | |
| 136 int stub_size; | |
| 137 int scopes_data_size; | |
| 138 int scopes_pcs_size; | |
| 139 int dependencies_size; | |
| 140 int handler_table_size; | |
| 141 int nul_chk_table_size; | |
| 142 int oops_size; | |
| 143 | |
| 144 void note_nmethod(nmethod* nm) { | |
| 145 nmethod_count += 1; | |
| 146 total_size += nm->size(); | |
| 147 relocation_size += nm->relocation_size(); | |
| 148 consts_size += nm->consts_size(); | |
| 149 insts_size += nm->insts_size(); | |
| 150 stub_size += nm->stub_size(); | |
| 151 oops_size += nm->oops_size(); | |
| 152 scopes_data_size += nm->scopes_data_size(); | |
| 153 scopes_pcs_size += nm->scopes_pcs_size(); | |
| 154 dependencies_size += nm->dependencies_size(); | |
| 155 handler_table_size += nm->handler_table_size(); | |
| 156 nul_chk_table_size += nm->nul_chk_table_size(); | |
| 157 } | |
| 158 void print_nmethod_stats() { | |
| 159 if (nmethod_count == 0) return; | |
| 160 tty->print_cr("Statistics for %d bytecoded nmethods:", nmethod_count); | |
| 161 if (total_size != 0) tty->print_cr(" total in heap = %d", total_size); | |
| 162 if (relocation_size != 0) tty->print_cr(" relocation = %d", relocation_size); | |
| 163 if (consts_size != 0) tty->print_cr(" constants = %d", consts_size); | |
| 164 if (insts_size != 0) tty->print_cr(" main code = %d", insts_size); | |
| 165 if (stub_size != 0) tty->print_cr(" stub code = %d", stub_size); | |
| 166 if (oops_size != 0) tty->print_cr(" oops = %d", oops_size); | |
| 167 if (scopes_data_size != 0) tty->print_cr(" scopes data = %d", scopes_data_size); | |
| 168 if (scopes_pcs_size != 0) tty->print_cr(" scopes pcs = %d", scopes_pcs_size); | |
| 169 if (dependencies_size != 0) tty->print_cr(" dependencies = %d", dependencies_size); | |
| 170 if (handler_table_size != 0) tty->print_cr(" handler table = %d", handler_table_size); | |
| 171 if (nul_chk_table_size != 0) tty->print_cr(" nul chk table = %d", nul_chk_table_size); | |
| 172 } | |
| 173 | |
| 174 int native_nmethod_count; | |
| 175 int native_total_size; | |
| 176 int native_relocation_size; | |
| 177 int native_insts_size; | |
| 178 int native_oops_size; | |
| 179 void note_native_nmethod(nmethod* nm) { | |
| 180 native_nmethod_count += 1; | |
| 181 native_total_size += nm->size(); | |
| 182 native_relocation_size += nm->relocation_size(); | |
| 183 native_insts_size += nm->insts_size(); | |
| 184 native_oops_size += nm->oops_size(); | |
| 185 } | |
| 186 void print_native_nmethod_stats() { | |
| 187 if (native_nmethod_count == 0) return; | |
| 188 tty->print_cr("Statistics for %d native nmethods:", native_nmethod_count); | |
| 189 if (native_total_size != 0) tty->print_cr(" N. total size = %d", native_total_size); | |
| 190 if (native_relocation_size != 0) tty->print_cr(" N. relocation = %d", native_relocation_size); | |
| 191 if (native_insts_size != 0) tty->print_cr(" N. main code = %d", native_insts_size); | |
| 192 if (native_oops_size != 0) tty->print_cr(" N. oops = %d", native_oops_size); | |
| 193 } | |
| 194 | |
| 195 int pc_desc_resets; // number of resets (= number of caches) | |
| 196 int pc_desc_queries; // queries to nmethod::find_pc_desc | |
| 197 int pc_desc_approx; // number of those which have approximate true | |
| 198 int pc_desc_repeats; // number of _pc_descs[0] hits | |
| 199 int pc_desc_hits; // number of LRU cache hits | |
| 200 int pc_desc_tests; // total number of PcDesc examinations | |
| 201 int pc_desc_searches; // total number of quasi-binary search steps | |
| 202 int pc_desc_adds; // number of LUR cache insertions | |
| 203 | |
| 204 void print_pc_stats() { | |
| 205 tty->print_cr("PcDesc Statistics: %d queries, %.2f comparisons per query", | |
| 206 pc_desc_queries, | |
| 207 (double)(pc_desc_tests + pc_desc_searches) | |
| 208 / pc_desc_queries); | |
| 209 tty->print_cr(" caches=%d queries=%d/%d, hits=%d+%d, tests=%d+%d, adds=%d", | |
| 210 pc_desc_resets, | |
| 211 pc_desc_queries, pc_desc_approx, | |
| 212 pc_desc_repeats, pc_desc_hits, | |
| 213 pc_desc_tests, pc_desc_searches, pc_desc_adds); | |
| 214 } | |
| 215 } nmethod_stats; | |
|
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Backed out changeset: 7bd4a69b4ce1
Christian Haeubl <haeubl@ssw.jku.at>
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216 |
| 9707 | 217 |
| 218 //--------------------------------------------------------------------------------- | |
| 219 | |
| 220 | |
| 221 ExceptionCache::ExceptionCache(Handle exception, address pc, address handler) { | |
| 222 assert(pc != NULL, "Must be non null"); | |
| 223 assert(exception.not_null(), "Must be non null"); | |
| 224 assert(handler != NULL, "Must be non null"); | |
| 225 | |
| 226 _count = 0; | |
| 227 _exception_type = exception->klass(); | |
| 228 _next = NULL; | |
| 229 | |
| 230 add_address_and_handler(pc,handler); | |
| 231 } | |
| 232 | |
| 233 | |
| 234 address ExceptionCache::match(Handle exception, address pc) { | |
| 235 assert(pc != NULL,"Must be non null"); | |
| 236 assert(exception.not_null(),"Must be non null"); | |
| 237 if (exception->klass() == exception_type()) { | |
| 238 return (test_address(pc)); | |
| 239 } | |
| 240 | |
| 241 return NULL; | |
| 242 } | |
| 243 | |
| 244 | |
| 245 bool ExceptionCache::match_exception_with_space(Handle exception) { | |
| 246 assert(exception.not_null(),"Must be non null"); | |
| 247 if (exception->klass() == exception_type() && count() < cache_size) { | |
| 248 return true; | |
| 249 } | |
| 250 return false; | |
| 251 } | |
| 252 | |
| 253 | |
| 254 address ExceptionCache::test_address(address addr) { | |
| 255 for (int i=0; i<count(); i++) { | |
| 256 if (pc_at(i) == addr) { | |
| 257 return handler_at(i); | |
| 258 } | |
| 259 } | |
| 260 return NULL; | |
| 261 } | |
| 262 | |
| 263 | |
| 264 bool ExceptionCache::add_address_and_handler(address addr, address handler) { | |
| 265 if (test_address(addr) == handler) return true; | |
| 266 if (count() < cache_size) { | |
| 267 set_pc_at(count(),addr); | |
| 268 set_handler_at(count(), handler); | |
| 269 increment_count(); | |
| 270 return true; | |
| 271 } | |
| 272 return false; | |
| 273 } | |
| 274 | |
| 275 | |
| 276 // private method for handling exception cache | |
| 277 // These methods are private, and used to manipulate the exception cache | |
| 278 // directly. | |
| 279 ExceptionCache* nmethod::exception_cache_entry_for_exception(Handle exception) { | |
| 280 ExceptionCache* ec = exception_cache(); | |
| 281 while (ec != NULL) { | |
| 282 if (ec->match_exception_with_space(exception)) { | |
| 283 return ec; | |
| 284 } | |
| 285 ec = ec->next(); | |
| 286 } | |
| 287 return NULL; | |
| 288 } | |
| 289 | |
| 290 | |
| 291 //----------------------------------------------------------------------------- | |
| 292 | |
| 293 | |
| 294 // Helper used by both find_pc_desc methods. | |
| 295 static inline bool match_desc(PcDesc* pc, int pc_offset, bool approximate) { | |
| 296 NOT_PRODUCT(++nmethod_stats.pc_desc_tests); | |
| 297 if (!approximate) | |
| 298 return pc->pc_offset() == pc_offset; | |
| 299 else | |
| 300 return (pc-1)->pc_offset() < pc_offset && pc_offset <= pc->pc_offset(); | |
| 301 } | |
| 302 | |
| 303 void PcDescCache::reset_to(PcDesc* initial_pc_desc) { | |
| 304 if (initial_pc_desc == NULL) { | |
| 305 _pc_descs[0] = NULL; // native method; no PcDescs at all | |
| 306 return; | |
| 307 } | |
| 308 NOT_PRODUCT(++nmethod_stats.pc_desc_resets); | |
| 309 // reset the cache by filling it with benign (non-null) values | |
| 310 assert(initial_pc_desc->pc_offset() < 0, "must be sentinel"); | |
| 311 for (int i = 0; i < cache_size; i++) | |
| 312 _pc_descs[i] = initial_pc_desc; | |
| 313 } | |
| 314 | |
| 315 PcDesc* PcDescCache::find_pc_desc(int pc_offset, bool approximate) { | |
| 316 NOT_PRODUCT(++nmethod_stats.pc_desc_queries); | |
| 317 NOT_PRODUCT(if (approximate) ++nmethod_stats.pc_desc_approx); | |
| 318 | |
| 319 // Note: one might think that caching the most recently | |
| 320 // read value separately would be a win, but one would be | |
| 321 // wrong. When many threads are updating it, the cache | |
| 322 // line it's in would bounce between caches, negating | |
| 323 // any benefit. | |
| 324 | |
| 325 // In order to prevent race conditions do not load cache elements | |
| 326 // repeatedly, but use a local copy: | |
| 327 PcDesc* res; | |
| 328 | |
| 329 // Step one: Check the most recently added value. | |
| 330 res = _pc_descs[0]; | |
| 331 if (res == NULL) return NULL; // native method; no PcDescs at all | |
| 332 if (match_desc(res, pc_offset, approximate)) { | |
| 333 NOT_PRODUCT(++nmethod_stats.pc_desc_repeats); | |
| 334 return res; | |
| 335 } | |
| 336 | |
| 337 // Step two: Check the rest of the LRU cache. | |
| 338 for (int i = 1; i < cache_size; ++i) { | |
| 339 res = _pc_descs[i]; | |
| 340 if (res->pc_offset() < 0) break; // optimization: skip empty cache | |
| 341 if (match_desc(res, pc_offset, approximate)) { | |
| 342 NOT_PRODUCT(++nmethod_stats.pc_desc_hits); | |
| 343 return res; | |
| 344 } | |
| 345 } | |
| 346 | |
| 347 // Report failure. | |
| 348 return NULL; | |
| 349 } | |
| 350 | |
| 351 void PcDescCache::add_pc_desc(PcDesc* pc_desc) { | |
| 352 NOT_PRODUCT(++nmethod_stats.pc_desc_adds); | |
| 353 // Update the LRU cache by shifting pc_desc forward. | |
| 354 for (int i = 0; i < cache_size; i++) { | |
| 355 PcDesc* next = _pc_descs[i]; | |
| 356 _pc_descs[i] = pc_desc; | |
| 357 pc_desc = next; | |
| 358 } | |
| 359 } | |
| 360 | |
| 361 // adjust pcs_size so that it is a multiple of both oopSize and | |
| 362 // sizeof(PcDesc) (assumes that if sizeof(PcDesc) is not a multiple | |
| 363 // of oopSize, then 2*sizeof(PcDesc) is) | |
| 364 static int adjust_pcs_size(int pcs_size) { | |
| 365 int nsize = round_to(pcs_size, oopSize); | |
| 366 if ((nsize % sizeof(PcDesc)) != 0) { | |
| 367 nsize = pcs_size + sizeof(PcDesc); | |
| 368 } | |
| 369 assert((nsize % oopSize) == 0, "correct alignment"); | |
| 370 return nsize; | |
| 371 } | |
| 372 | |
| 373 //----------------------------------------------------------------------------- | |
| 374 | |
| 375 | |
| 376 void nmethod::add_exception_cache_entry(ExceptionCache* new_entry) { | |
| 377 assert(ExceptionCache_lock->owned_by_self(),"Must hold the ExceptionCache_lock"); | |
| 378 assert(new_entry != NULL,"Must be non null"); | |
| 379 assert(new_entry->next() == NULL, "Must be null"); | |
| 380 | |
| 381 if (exception_cache() != NULL) { | |
| 382 new_entry->set_next(exception_cache()); | |
| 383 } | |
| 384 set_exception_cache(new_entry); | |
| 385 } | |
| 386 | |
| 387 void nmethod::remove_from_exception_cache(ExceptionCache* ec) { | |
| 388 ExceptionCache* prev = NULL; | |
| 389 ExceptionCache* curr = exception_cache(); | |
| 390 assert(curr != NULL, "nothing to remove"); | |
| 391 // find the previous and next entry of ec | |
| 392 while (curr != ec) { | |
| 393 prev = curr; | |
| 394 curr = curr->next(); | |
| 395 assert(curr != NULL, "ExceptionCache not found"); | |
| 396 } | |
| 397 // now: curr == ec | |
| 398 ExceptionCache* next = curr->next(); | |
| 399 if (prev == NULL) { | |
| 400 set_exception_cache(next); | |
| 401 } else { | |
| 402 prev->set_next(next); | |
| 403 } | |
| 404 delete curr; | |
| 405 } | |
| 406 | |
| 407 | |
| 408 // public method for accessing the exception cache | |
| 409 // These are the public access methods. | |
| 410 address nmethod::handler_for_exception_and_pc(Handle exception, address pc) { | |
| 411 // We never grab a lock to read the exception cache, so we may | |
| 412 // have false negatives. This is okay, as it can only happen during | |
| 413 // the first few exception lookups for a given nmethod. | |
| 414 ExceptionCache* ec = exception_cache(); | |
| 415 while (ec != NULL) { | |
| 416 address ret_val; | |
| 417 if ((ret_val = ec->match(exception,pc)) != NULL) { | |
| 418 return ret_val; | |
| 419 } | |
| 420 ec = ec->next(); | |
| 421 } | |
| 422 return NULL; | |
| 423 } | |
| 424 | |
| 425 | |
| 426 void nmethod::add_handler_for_exception_and_pc(Handle exception, address pc, address handler) { | |
| 427 // There are potential race conditions during exception cache updates, so we | |
| 428 // must own the ExceptionCache_lock before doing ANY modifications. Because | |
| 429 // we don't lock during reads, it is possible to have several threads attempt | |
| 430 // to update the cache with the same data. We need to check for already inserted | |
| 431 // copies of the current data before adding it. | |
| 432 | |
| 433 MutexLocker ml(ExceptionCache_lock); | |
| 434 ExceptionCache* target_entry = exception_cache_entry_for_exception(exception); | |
| 435 | |
| 436 if (target_entry == NULL || !target_entry->add_address_and_handler(pc,handler)) { | |
| 437 target_entry = new ExceptionCache(exception,pc,handler); | |
| 438 add_exception_cache_entry(target_entry); | |
| 439 } | |
| 440 } | |
| 441 | |
| 442 | |
| 443 //-------------end of code for ExceptionCache-------------- | |
| 444 | |
| 445 | |
| 446 int nmethod::total_size() const { | |
| 447 return | |
| 448 consts_size() + | |
| 449 insts_size() + | |
| 450 stub_size() + | |
| 451 scopes_data_size() + | |
| 452 scopes_pcs_size() + | |
| 453 handler_table_size() + | |
| 454 nul_chk_table_size(); | |
| 455 } | |
| 456 | |
| 457 const char* nmethod::compile_kind() const { | |
| 458 if (is_osr_method()) return "osr"; | |
| 459 if (method() != NULL && is_native_method()) return "c2n"; | |
| 460 return NULL; | |
| 461 } | |
| 462 | |
| 463 // Fill in default values for various flag fields | |
| 464 void nmethod::init_defaults() { | |
| 465 _state = alive; | |
| 466 _marked_for_reclamation = 0; | |
| 467 _has_flushed_dependencies = 0; | |
| 468 _speculatively_disconnected = 0; | |
| 469 _has_unsafe_access = 0; | |
| 470 _has_method_handle_invokes = 0; | |
| 471 _lazy_critical_native = 0; | |
| 472 _has_wide_vectors = 0; | |
| 473 _marked_for_deoptimization = 0; | |
| 474 _lock_count = 0; | |
| 475 _stack_traversal_mark = 0; | |
| 476 _unload_reported = false; // jvmti state | |
| 477 | |
| 478 #ifdef ASSERT | |
| 479 _oops_are_stale = false; | |
| 480 #endif | |
| 481 | |
| 482 _oops_do_mark_link = NULL; | |
| 483 _jmethod_id = NULL; | |
| 484 _osr_link = NULL; | |
| 485 _scavenge_root_link = NULL; | |
| 486 _scavenge_root_state = 0; | |
| 487 _saved_nmethod_link = NULL; | |
| 488 _compiler = NULL; | |
| 489 #ifdef GRAAL | |
| 490 _graal_installed_code = NULL; | |
| 491 _triggered_deoptimizations = NULL; | |
| 492 #endif | |
| 493 #ifdef HAVE_DTRACE_H | |
| 494 _trap_offset = 0; | |
| 495 #endif // def HAVE_DTRACE_H | |
| 496 } | |
| 497 | |
| 498 nmethod* nmethod::new_native_nmethod(methodHandle method, | |
| 499 int compile_id, | |
| 500 CodeBuffer *code_buffer, | |
| 501 int vep_offset, | |
| 502 int frame_complete, | |
| 503 int frame_size, | |
| 504 ByteSize basic_lock_owner_sp_offset, | |
| 505 ByteSize basic_lock_sp_offset, | |
| 506 OopMapSet* oop_maps) { | |
| 507 code_buffer->finalize_oop_references(method); | |
| 508 // create nmethod | |
| 509 nmethod* nm = NULL; | |
| 510 { | |
| 511 MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag); | |
| 512 int native_nmethod_size = allocation_size(code_buffer, sizeof(nmethod)); | |
|
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3c786355ffb4
8009026: [parfait] Null pointer deference in hotspot/src/share/vm/code/nmethod.cpp
morris
parents:
6983
diff
changeset
|
513 if (CodeCache::has_space(native_nmethod_size)) { |
|
3c786355ffb4
8009026: [parfait] Null pointer deference in hotspot/src/share/vm/code/nmethod.cpp
morris
parents:
6983
diff
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514 CodeOffsets offsets; |
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515 offsets.set_value(CodeOffsets::Verified_Entry, vep_offset); |
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516 offsets.set_value(CodeOffsets::Frame_Complete, frame_complete); |
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517 nm = new (native_nmethod_size) nmethod(method(), native_nmethod_size, |
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518 compile_id, &offsets, |
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519 code_buffer, frame_size, |
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520 basic_lock_owner_sp_offset, |
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521 basic_lock_sp_offset, oop_maps); |
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522 if (nm != NULL) nmethod_stats.note_native_nmethod(nm); |
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523 if (PrintAssembly && nm != NULL) |
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524 Disassembler::decode(nm); |
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525 } |
| 9707 | 526 } |
| 527 // verify nmethod | |
| 528 debug_only(if (nm) nm->verify();) // might block | |
| 529 | |
| 530 if (nm != NULL) { | |
| 531 nm->log_new_nmethod(); | |
| 532 } | |
| 533 | |
| 534 return nm; | |
| 535 } | |
| 536 | |
| 537 #ifdef HAVE_DTRACE_H | |
| 538 nmethod* nmethod::new_dtrace_nmethod(methodHandle method, | |
| 539 CodeBuffer *code_buffer, | |
| 540 int vep_offset, | |
| 541 int trap_offset, | |
| 542 int frame_complete, | |
| 543 int frame_size) { | |
| 544 code_buffer->finalize_oop_references(method); | |
| 545 // create nmethod | |
| 546 nmethod* nm = NULL; | |
| 547 { | |
| 548 MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag); | |
| 549 int nmethod_size = allocation_size(code_buffer, sizeof(nmethod)); | |
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550 if (CodeCache::has_space(nmethod_size)) { |
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551 CodeOffsets offsets; |
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552 offsets.set_value(CodeOffsets::Verified_Entry, vep_offset); |
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553 offsets.set_value(CodeOffsets::Dtrace_trap, trap_offset); |
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554 offsets.set_value(CodeOffsets::Frame_Complete, frame_complete); |
| 9707 | 555 |
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556 nm = new (nmethod_size) nmethod(method(), nmethod_size, |
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557 &offsets, code_buffer, frame_size); |
| 9707 | 558 |
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559 if (nm != NULL) nmethod_stats.note_nmethod(nm); |
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560 if (PrintAssembly && nm != NULL) |
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561 Disassembler::decode(nm); |
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562 } |
| 9707 | 563 } |
| 564 // verify nmethod | |
| 565 debug_only(if (nm) nm->verify();) // might block | |
| 566 | |
| 567 if (nm != NULL) { | |
| 568 nm->log_new_nmethod(); | |
| 569 } | |
| 570 | |
| 571 return nm; | |
| 572 } | |
| 573 | |
| 574 #endif // def HAVE_DTRACE_H | |
| 575 | |
| 576 nmethod* nmethod::new_nmethod(methodHandle method, | |
| 577 int compile_id, | |
| 578 int entry_bci, | |
| 579 CodeOffsets* offsets, | |
| 580 int orig_pc_offset, | |
| 581 DebugInformationRecorder* debug_info, | |
| 582 Dependencies* dependencies, | |
| 583 CodeBuffer* code_buffer, int frame_size, | |
| 584 OopMapSet* oop_maps, | |
| 585 ExceptionHandlerTable* handler_table, | |
| 586 ImplicitExceptionTable* nul_chk_table, | |
| 587 AbstractCompiler* compiler, | |
| 588 int comp_level, | |
| 589 GrowableArray<jlong>* leaf_graph_ids | |
| 590 #ifdef GRAAL | |
| 591 , Handle installed_code, | |
| 592 Handle triggered_deoptimizations | |
| 593 #endif | |
| 594 ) | |
| 595 { | |
| 596 assert(debug_info->oop_recorder() == code_buffer->oop_recorder(), "shared OR"); | |
| 597 code_buffer->finalize_oop_references(method); | |
| 598 int leaf_graph_ids_size = leaf_graph_ids == NULL ? 0 : round_to(sizeof(jlong) * leaf_graph_ids->length(), oopSize); | |
| 599 // create nmethod | |
| 600 nmethod* nm = NULL; | |
| 601 { MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag); | |
| 602 int nmethod_size = | |
| 603 allocation_size(code_buffer, sizeof(nmethod)) | |
| 604 + adjust_pcs_size(debug_info->pcs_size()) | |
| 605 + round_to(dependencies->size_in_bytes() , oopSize) | |
| 606 + round_to(handler_table->size_in_bytes(), oopSize) | |
| 607 + round_to(nul_chk_table->size_in_bytes(), oopSize) | |
| 608 + round_to(debug_info->data_size() , oopSize) | |
| 8883 | 609 + leaf_graph_ids_size; |
| 9707 | 610 if (CodeCache::has_space(nmethod_size)) { |
| 611 nm = new (nmethod_size) | |
| 612 nmethod(method(), nmethod_size, compile_id, entry_bci, offsets, | |
| 613 orig_pc_offset, debug_info, dependencies, code_buffer, frame_size, | |
| 614 oop_maps, | |
| 615 handler_table, | |
| 616 nul_chk_table, | |
| 617 compiler, | |
| 618 comp_level, | |
| 619 leaf_graph_ids | |
| 620 #ifdef GRAAL | |
| 621 , installed_code, | |
| 622 triggered_deoptimizations | |
| 623 #endif | |
| 8883 | 624 ); |
| 9707 | 625 } |
| 626 if (nm != NULL) { | |
| 627 // To make dependency checking during class loading fast, record | |
| 628 // the nmethod dependencies in the classes it is dependent on. | |
| 629 // This allows the dependency checking code to simply walk the | |
| 630 // class hierarchy above the loaded class, checking only nmethods | |
| 631 // which are dependent on those classes. The slow way is to | |
| 632 // check every nmethod for dependencies which makes it linear in | |
| 633 // the number of methods compiled. For applications with a lot | |
| 634 // classes the slow way is too slow. | |
| 635 for (Dependencies::DepStream deps(nm); deps.next(); ) { | |
| 636 Klass* klass = deps.context_type(); | |
| 637 if (klass == NULL) continue; // ignore things like evol_method | |
| 638 | |
| 639 // record this nmethod as dependent on this klass | |
| 640 InstanceKlass::cast(klass)->add_dependent_nmethod(nm); | |
| 641 } | |
| 642 } | |
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643 if (nm != NULL) nmethod_stats.note_nmethod(nm); |
| 9707 | 644 if (PrintAssembly && nm != NULL) |
| 645 Disassembler::decode(nm); | |
| 646 } | |
| 647 | |
| 648 // verify nmethod | |
| 649 debug_only(if (nm) nm->verify();) // might block | |
| 650 | |
| 651 if (nm != NULL) { | |
| 652 nm->log_new_nmethod(); | |
| 653 } | |
| 654 | |
| 655 // done | |
| 656 return nm; | |
| 657 } | |
| 658 | |
| 659 | |
| 660 // For native wrappers | |
| 661 nmethod::nmethod( | |
| 662 Method* method, | |
| 663 int nmethod_size, | |
| 664 int compile_id, | |
| 665 CodeOffsets* offsets, | |
| 666 CodeBuffer* code_buffer, | |
| 667 int frame_size, | |
| 668 ByteSize basic_lock_owner_sp_offset, | |
| 669 ByteSize basic_lock_sp_offset, | |
| 670 OopMapSet* oop_maps ) | |
| 671 : CodeBlob("native nmethod", code_buffer, sizeof(nmethod), | |
| 672 nmethod_size, offsets->value(CodeOffsets::Frame_Complete), frame_size, oop_maps), | |
| 673 _native_receiver_sp_offset(basic_lock_owner_sp_offset), | |
| 674 _native_basic_lock_sp_offset(basic_lock_sp_offset) | |
| 675 { | |
| 676 { | |
| 677 debug_only(No_Safepoint_Verifier nsv;) | |
| 678 assert_locked_or_safepoint(CodeCache_lock); | |
| 679 | |
| 680 init_defaults(); | |
| 681 _method = method; | |
| 682 _entry_bci = InvocationEntryBci; | |
| 683 // We have no exception handler or deopt handler make the | |
| 684 // values something that will never match a pc like the nmethod vtable entry | |
| 685 _exception_offset = 0; | |
| 686 _deoptimize_offset = 0; | |
| 687 _deoptimize_mh_offset = 0; | |
| 688 _orig_pc_offset = 0; | |
| 689 | |
| 690 _consts_offset = data_offset(); | |
| 691 _stub_offset = data_offset(); | |
| 692 _oops_offset = data_offset(); | |
| 693 _metadata_offset = _oops_offset + round_to(code_buffer->total_oop_size(), oopSize); | |
| 694 _scopes_data_offset = _metadata_offset + round_to(code_buffer->total_metadata_size(), wordSize); | |
| 695 _scopes_pcs_offset = _scopes_data_offset; | |
| 696 _dependencies_offset = _scopes_pcs_offset; | |
| 697 _handler_table_offset = _dependencies_offset; | |
| 698 _nul_chk_table_offset = _handler_table_offset; | |
| 699 _leaf_graph_ids_offset = _nul_chk_table_offset; | |
| 700 _nmethod_end_offset = _leaf_graph_ids_offset; | |
| 701 _compile_id = compile_id; | |
| 702 _comp_level = CompLevel_none; | |
| 703 _entry_point = code_begin() + offsets->value(CodeOffsets::Entry); | |
| 704 _verified_entry_point = code_begin() + offsets->value(CodeOffsets::Verified_Entry); | |
| 705 _osr_entry_point = NULL; | |
| 706 _exception_cache = NULL; | |
| 707 _pc_desc_cache.reset_to(NULL); | |
| 708 | |
| 709 code_buffer->copy_values_to(this); | |
| 710 if (ScavengeRootsInCode && detect_scavenge_root_oops()) { | |
| 711 CodeCache::add_scavenge_root_nmethod(this); | |
| 712 } | |
| 713 debug_only(verify_scavenge_root_oops()); | |
| 714 CodeCache::commit(this); | |
| 715 } | |
| 716 | |
| 717 if (PrintNativeNMethods || PrintDebugInfo || PrintRelocations || PrintDependencies) { | |
| 718 ttyLocker ttyl; // keep the following output all in one block | |
| 719 // This output goes directly to the tty, not the compiler log. | |
| 720 // To enable tools to match it up with the compilation activity, | |
| 721 // be sure to tag this tty output with the compile ID. | |
| 722 if (xtty != NULL) { | |
| 723 xtty->begin_head("print_native_nmethod"); | |
| 724 xtty->method(_method); | |
| 725 xtty->stamp(); | |
| 726 xtty->end_head(" address='" INTPTR_FORMAT "'", (intptr_t) this); | |
| 727 } | |
| 728 // print the header part first | |
| 729 print(); | |
| 730 // then print the requested information | |
| 731 if (PrintNativeNMethods) { | |
| 732 print_code(); | |
| 733 if (oop_maps != NULL) { | |
| 734 oop_maps->print(); | |
| 735 } | |
| 736 } | |
| 737 if (PrintRelocations) { | |
| 738 print_relocations(); | |
| 739 } | |
| 740 if (xtty != NULL) { | |
| 741 xtty->tail("print_native_nmethod"); | |
| 742 } | |
| 743 } | |
| 744 } | |
| 745 | |
| 746 // For dtrace wrappers | |
| 747 #ifdef HAVE_DTRACE_H | |
| 748 nmethod::nmethod( | |
| 749 Method* method, | |
| 750 int nmethod_size, | |
| 751 CodeOffsets* offsets, | |
| 752 CodeBuffer* code_buffer, | |
| 753 int frame_size) | |
| 754 : CodeBlob("dtrace nmethod", code_buffer, sizeof(nmethod), | |
| 755 nmethod_size, offsets->value(CodeOffsets::Frame_Complete), frame_size, NULL), | |
| 756 _native_receiver_sp_offset(in_ByteSize(-1)), | |
| 757 _native_basic_lock_sp_offset(in_ByteSize(-1)) | |
| 758 { | |
| 759 { | |
| 760 debug_only(No_Safepoint_Verifier nsv;) | |
| 761 assert_locked_or_safepoint(CodeCache_lock); | |
| 762 | |
| 763 init_defaults(); | |
| 764 _method = method; | |
| 765 _entry_bci = InvocationEntryBci; | |
| 766 // We have no exception handler or deopt handler make the | |
| 767 // values something that will never match a pc like the nmethod vtable entry | |
| 768 _exception_offset = 0; | |
| 769 _deoptimize_offset = 0; | |
| 770 _deoptimize_mh_offset = 0; | |
| 771 _unwind_handler_offset = -1; | |
| 772 _trap_offset = offsets->value(CodeOffsets::Dtrace_trap); | |
| 773 _orig_pc_offset = 0; | |
| 774 _consts_offset = data_offset(); | |
| 775 _stub_offset = data_offset(); | |
| 776 _oops_offset = data_offset(); | |
| 777 _metadata_offset = _oops_offset + round_to(code_buffer->total_oop_size(), oopSize); | |
| 778 _scopes_data_offset = _metadata_offset + round_to(code_buffer->total_metadata_size(), wordSize); | |
| 779 _scopes_pcs_offset = _scopes_data_offset; | |
| 780 _dependencies_offset = _scopes_pcs_offset; | |
| 781 _handler_table_offset = _dependencies_offset; | |
| 782 _nul_chk_table_offset = _handler_table_offset; | |
| 783 _nmethod_end_offset = _nul_chk_table_offset; | |
| 784 _compile_id = 0; // default | |
| 785 _comp_level = CompLevel_none; | |
| 786 _entry_point = code_begin() + offsets->value(CodeOffsets::Entry); | |
| 787 _verified_entry_point = code_begin() + offsets->value(CodeOffsets::Verified_Entry); | |
| 788 _osr_entry_point = NULL; | |
| 789 _exception_cache = NULL; | |
| 790 _pc_desc_cache.reset_to(NULL); | |
| 791 | |
| 792 code_buffer->copy_values_to(this); | |
| 793 debug_only(verify_scavenge_root_oops()); | |
| 794 CodeCache::commit(this); | |
| 795 } | |
| 796 | |
| 797 if (PrintNMethods || PrintDebugInfo || PrintRelocations || PrintDependencies) { | |
| 798 ttyLocker ttyl; // keep the following output all in one block | |
| 799 // This output goes directly to the tty, not the compiler log. | |
| 800 // To enable tools to match it up with the compilation activity, | |
| 801 // be sure to tag this tty output with the compile ID. | |
| 802 if (xtty != NULL) { | |
| 803 xtty->begin_head("print_dtrace_nmethod"); | |
| 804 xtty->method(_method); | |
| 805 xtty->stamp(); | |
| 806 xtty->end_head(" address='" INTPTR_FORMAT "'", (intptr_t) this); | |
| 807 } | |
| 808 // print the header part first | |
| 809 print(); | |
| 810 // then print the requested information | |
| 811 if (PrintNMethods) { | |
| 812 print_code(); | |
| 813 } | |
| 814 if (PrintRelocations) { | |
| 815 print_relocations(); | |
| 816 } | |
| 817 if (xtty != NULL) { | |
| 818 xtty->tail("print_dtrace_nmethod"); | |
| 819 } | |
| 820 } | |
| 821 } | |
| 822 #endif // def HAVE_DTRACE_H | |
| 823 | |
| 824 void* nmethod::operator new(size_t size, int nmethod_size) { | |
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825 void* alloc = CodeCache::allocate(nmethod_size); |
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826 guarantee(alloc != NULL, "CodeCache should have enough space"); |
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827 return alloc; |
| 9707 | 828 } |
| 829 | |
| 830 | |
| 831 nmethod::nmethod( | |
| 832 Method* method, | |
| 833 int nmethod_size, | |
| 834 int compile_id, | |
| 835 int entry_bci, | |
| 836 CodeOffsets* offsets, | |
| 837 int orig_pc_offset, | |
| 838 DebugInformationRecorder* debug_info, | |
| 839 Dependencies* dependencies, | |
| 840 CodeBuffer *code_buffer, | |
| 841 int frame_size, | |
| 842 OopMapSet* oop_maps, | |
| 843 ExceptionHandlerTable* handler_table, | |
| 844 ImplicitExceptionTable* nul_chk_table, | |
| 845 AbstractCompiler* compiler, | |
| 846 int comp_level, | |
| 847 GrowableArray<jlong>* leaf_graph_ids | |
| 848 #ifdef GRAAL | |
| 849 , Handle installed_code, | |
| 850 Handle triggered_deoptimizations | |
| 851 #endif | |
| 852 ) | |
| 853 : CodeBlob("nmethod", code_buffer, sizeof(nmethod), | |
| 854 nmethod_size, offsets->value(CodeOffsets::Frame_Complete), frame_size, oop_maps), | |
| 855 _native_receiver_sp_offset(in_ByteSize(-1)), | |
| 856 _native_basic_lock_sp_offset(in_ByteSize(-1)) | |
| 857 { | |
| 858 assert(debug_info->oop_recorder() == code_buffer->oop_recorder(), "shared OR"); | |
| 859 { | |
| 860 debug_only(No_Safepoint_Verifier nsv;) | |
| 861 assert_locked_or_safepoint(CodeCache_lock); | |
| 862 | |
| 863 init_defaults(); | |
| 864 _method = method; | |
| 865 _entry_bci = entry_bci; | |
| 866 _compile_id = compile_id; | |
| 867 _comp_level = comp_level; | |
| 868 _compiler = compiler; | |
| 869 _orig_pc_offset = orig_pc_offset; | |
| 870 | |
| 871 // Section offsets | |
| 872 _consts_offset = content_offset() + code_buffer->total_offset_of(code_buffer->consts()); | |
| 873 _stub_offset = content_offset() + code_buffer->total_offset_of(code_buffer->stubs()); | |
| 874 | |
| 875 #ifdef GRAAL | |
| 876 _graal_installed_code = installed_code(); | |
| 877 _triggered_deoptimizations = (typeArrayOop)triggered_deoptimizations(); | |
| 878 #endif | |
| 879 if (compiler->is_graal()) { | |
| 880 // Graal might not produce any stub sections | |
| 881 if (offsets->value(CodeOffsets::Exceptions) != -1) { | |
| 882 _exception_offset = code_offset() + offsets->value(CodeOffsets::Exceptions); | |
| 883 } else { | |
| 884 _exception_offset = -1; | |
| 885 } | |
| 886 if (offsets->value(CodeOffsets::Deopt) != -1) { | |
| 887 _deoptimize_offset = code_offset() + offsets->value(CodeOffsets::Deopt); | |
| 888 } else { | |
| 889 _deoptimize_offset = -1; | |
| 890 } | |
| 891 if (offsets->value(CodeOffsets::DeoptMH) != -1) { | |
| 892 _deoptimize_mh_offset = code_offset() + offsets->value(CodeOffsets::DeoptMH); | |
| 893 } else { | |
| 894 _deoptimize_mh_offset = -1; | |
| 895 } | |
| 896 } else { | |
| 897 // Exception handler and deopt handler are in the stub section | |
| 898 assert(offsets->value(CodeOffsets::Exceptions) != -1, "must be set"); | |
| 899 assert(offsets->value(CodeOffsets::Deopt ) != -1, "must be set"); | |
| 900 | |
| 901 _exception_offset = _stub_offset + offsets->value(CodeOffsets::Exceptions); | |
| 902 _deoptimize_offset = _stub_offset + offsets->value(CodeOffsets::Deopt); | |
| 903 if (offsets->value(CodeOffsets::DeoptMH) != -1) { | |
| 904 _deoptimize_mh_offset = _stub_offset + offsets->value(CodeOffsets::DeoptMH); | |
| 905 } else { | |
| 906 _deoptimize_mh_offset = -1; | |
| 907 } | |
| 908 } | |
| 909 if (offsets->value(CodeOffsets::UnwindHandler) != -1) { | |
| 910 _unwind_handler_offset = code_offset() + offsets->value(CodeOffsets::UnwindHandler); | |
| 911 } else { | |
| 912 _unwind_handler_offset = -1; | |
| 913 } | |
| 914 | |
| 915 int leaf_graph_ids_size = leaf_graph_ids == NULL ? 0 : round_to(sizeof(jlong) * leaf_graph_ids->length(), oopSize); | |
| 916 | |
| 917 _oops_offset = data_offset(); | |
| 918 _metadata_offset = _oops_offset + round_to(code_buffer->total_oop_size(), oopSize); | |
| 919 _scopes_data_offset = _metadata_offset + round_to(code_buffer->total_metadata_size(), wordSize); | |
| 920 | |
| 921 _scopes_pcs_offset = _scopes_data_offset + round_to(debug_info->data_size (), oopSize); | |
| 922 _dependencies_offset = _scopes_pcs_offset + adjust_pcs_size(debug_info->pcs_size()); | |
| 923 _handler_table_offset = _dependencies_offset + round_to(dependencies->size_in_bytes (), oopSize); | |
| 924 _nul_chk_table_offset = _handler_table_offset + round_to(handler_table->size_in_bytes(), oopSize); | |
| 925 _leaf_graph_ids_offset = _nul_chk_table_offset + round_to(nul_chk_table->size_in_bytes(), oopSize); | |
| 926 _nmethod_end_offset = _leaf_graph_ids_offset + leaf_graph_ids_size; | |
| 927 | |
| 928 _entry_point = code_begin() + offsets->value(CodeOffsets::Entry); | |
| 929 _verified_entry_point = code_begin() + offsets->value(CodeOffsets::Verified_Entry); | |
| 930 _osr_entry_point = code_begin() + offsets->value(CodeOffsets::OSR_Entry); | |
| 931 _exception_cache = NULL; | |
| 932 _pc_desc_cache.reset_to(scopes_pcs_begin()); | |
| 933 | |
| 934 // Copy contents of ScopeDescRecorder to nmethod | |
| 935 code_buffer->copy_values_to(this); | |
| 936 debug_info->copy_to(this); | |
| 937 dependencies->copy_to(this); | |
| 938 if (ScavengeRootsInCode && detect_scavenge_root_oops()) { | |
| 939 CodeCache::add_scavenge_root_nmethod(this); | |
| 940 } | |
| 941 debug_only(verify_scavenge_root_oops()); | |
| 942 | |
| 943 CodeCache::commit(this); | |
| 944 | |
| 945 // Copy contents of ExceptionHandlerTable to nmethod | |
| 946 handler_table->copy_to(this); | |
| 947 nul_chk_table->copy_to(this); | |
| 948 | |
| 949 if (leaf_graph_ids != NULL && leaf_graph_ids_size > 0) { | |
| 950 memcpy(leaf_graph_ids_begin(), leaf_graph_ids->adr_at(0), leaf_graph_ids_size); | |
| 951 } | |
| 952 | |
| 953 // we use the information of entry points to find out if a method is | |
| 954 // static or non static | |
| 955 assert(compiler->is_c2() || | |
| 956 _method->is_static() == (entry_point() == _verified_entry_point), | |
| 957 " entry points must be same for static methods and vice versa"); | |
| 958 } | |
| 959 | |
| 960 bool printnmethods = PrintNMethods | |
| 961 || CompilerOracle::should_print(_method) | |
| 962 || CompilerOracle::has_option_string(_method, "PrintNMethods"); | |
| 963 if (printnmethods || PrintDebugInfo || PrintRelocations || PrintDependencies || PrintExceptionHandlers) { | |
| 964 print_nmethod(printnmethods); | |
| 965 } | |
| 966 } | |
| 967 | |
| 968 | |
| 969 // Print a short set of xml attributes to identify this nmethod. The | |
| 970 // output should be embedded in some other element. | |
| 971 void nmethod::log_identity(xmlStream* log) const { | |
| 972 log->print(" compile_id='%d'", compile_id()); | |
| 973 const char* nm_kind = compile_kind(); | |
| 974 if (nm_kind != NULL) log->print(" compile_kind='%s'", nm_kind); | |
| 975 if (compiler() != NULL) { | |
| 976 log->print(" compiler='%s'", compiler()->name()); | |
| 977 } | |
| 978 if (TieredCompilation) { | |
| 979 log->print(" level='%d'", comp_level()); | |
| 980 } | |
| 981 } | |
| 982 | |
| 983 | |
| 984 #define LOG_OFFSET(log, name) \ | |
| 985 if ((intptr_t)name##_end() - (intptr_t)name##_begin()) \ | |
| 986 log->print(" " XSTR(name) "_offset='%d'" , \ | |
| 987 (intptr_t)name##_begin() - (intptr_t)this) | |
| 988 | |
| 989 | |
| 990 void nmethod::log_new_nmethod() const { | |
| 991 if (LogCompilation && xtty != NULL) { | |
| 992 ttyLocker ttyl; | |
| 993 HandleMark hm; | |
| 994 xtty->begin_elem("nmethod"); | |
| 995 log_identity(xtty); | |
| 996 xtty->print(" entry='" INTPTR_FORMAT "' size='%d'", code_begin(), size()); | |
| 997 xtty->print(" address='" INTPTR_FORMAT "'", (intptr_t) this); | |
| 998 | |
| 999 LOG_OFFSET(xtty, relocation); | |
| 1000 LOG_OFFSET(xtty, consts); | |
| 1001 LOG_OFFSET(xtty, insts); | |
| 1002 LOG_OFFSET(xtty, stub); | |
| 1003 LOG_OFFSET(xtty, scopes_data); | |
| 1004 LOG_OFFSET(xtty, scopes_pcs); | |
| 1005 LOG_OFFSET(xtty, dependencies); | |
| 1006 LOG_OFFSET(xtty, handler_table); | |
| 1007 LOG_OFFSET(xtty, nul_chk_table); | |
| 1008 LOG_OFFSET(xtty, oops); | |
| 1009 | |
| 1010 xtty->method(method()); | |
| 1011 xtty->stamp(); | |
| 1012 xtty->end_elem(); | |
| 1013 } | |
| 1014 } | |
| 1015 | |
| 1016 #undef LOG_OFFSET | |
| 1017 | |
| 1018 | |
| 1019 // Print out more verbose output usually for a newly created nmethod. | |
| 1020 void nmethod::print_on(outputStream* st, const char* msg) const { | |
| 1021 if (st != NULL) { | |
| 1022 ttyLocker ttyl; | |
| 1023 if (WizardMode) { | |
| 1024 CompileTask::print_compilation(st, this, msg, /*short_form:*/ true); | |
| 1025 st->print_cr(" (" INTPTR_FORMAT ")", this); | |
| 1026 } else { | |
| 1027 CompileTask::print_compilation(st, this, msg, /*short_form:*/ false); | |
| 1028 } | |
| 1029 } | |
| 1030 } | |
| 1031 | |
| 1032 | |
| 1033 void nmethod::print_nmethod(bool printmethod) { | |
| 1034 ttyLocker ttyl; // keep the following output all in one block | |
| 1035 if (xtty != NULL) { | |
| 1036 xtty->begin_head("print_nmethod"); | |
| 1037 xtty->stamp(); | |
| 1038 xtty->end_head(); | |
| 1039 } | |
| 1040 // print the header part first | |
| 1041 print(); | |
| 1042 // then print the requested information | |
| 1043 if (printmethod) { | |
| 1044 print_code(); | |
| 1045 print_pcs(); | |
| 1046 if (oop_maps()) { | |
| 1047 oop_maps()->print(); | |
| 1048 } | |
| 1049 } | |
| 1050 if (PrintDebugInfo) { | |
| 1051 print_scopes(); | |
| 1052 } | |
| 1053 if (PrintRelocations) { | |
| 1054 print_relocations(); | |
| 1055 } | |
| 1056 if (PrintDependencies) { | |
| 1057 print_dependencies(); | |
| 1058 } | |
| 1059 if (PrintExceptionHandlers) { | |
| 1060 print_handler_table(); | |
| 1061 print_nul_chk_table(); | |
| 1062 } | |
| 1063 if (xtty != NULL) { | |
| 1064 xtty->tail("print_nmethod"); | |
| 1065 } | |
| 1066 } | |
| 1067 | |
| 1068 | |
| 1069 // Promote one word from an assembly-time handle to a live embedded oop. | |
| 1070 inline void nmethod::initialize_immediate_oop(oop* dest, jobject handle) { | |
| 1071 if (handle == NULL || | |
| 1072 // As a special case, IC oops are initialized to 1 or -1. | |
| 1073 handle == (jobject) Universe::non_oop_word()) { | |
| 1074 (*dest) = (oop) handle; | |
| 1075 } else { | |
| 1076 (*dest) = JNIHandles::resolve_non_null(handle); | |
| 1077 } | |
| 1078 } | |
| 1079 | |
| 1080 | |
| 1081 // Have to have the same name because it's called by a template | |
| 1082 void nmethod::copy_values(GrowableArray<jobject>* array) { | |
| 1083 int length = array->length(); | |
| 1084 assert((address)(oops_begin() + length) <= (address)oops_end(), "oops big enough"); | |
| 1085 oop* dest = oops_begin(); | |
| 1086 for (int index = 0 ; index < length; index++) { | |
| 1087 initialize_immediate_oop(&dest[index], array->at(index)); | |
| 1088 } | |
| 1089 | |
| 1090 // Now we can fix up all the oops in the code. We need to do this | |
| 1091 // in the code because the assembler uses jobjects as placeholders. | |
| 1092 // The code and relocations have already been initialized by the | |
| 1093 // CodeBlob constructor, so it is valid even at this early point to | |
| 1094 // iterate over relocations and patch the code. | |
| 1095 fix_oop_relocations(NULL, NULL, /*initialize_immediates=*/ true); | |
| 1096 } | |
| 1097 | |
| 1098 void nmethod::copy_values(GrowableArray<Metadata*>* array) { | |
| 1099 int length = array->length(); | |
| 1100 assert((address)(metadata_begin() + length) <= (address)metadata_end(), "big enough"); | |
| 1101 Metadata** dest = metadata_begin(); | |
| 1102 for (int index = 0 ; index < length; index++) { | |
| 1103 dest[index] = array->at(index); | |
| 1104 } | |
| 1105 } | |
| 1106 | |
| 1107 bool nmethod::is_at_poll_return(address pc) { | |
| 1108 RelocIterator iter(this, pc, pc+1); | |
| 1109 while (iter.next()) { | |
| 1110 if (iter.type() == relocInfo::poll_return_type) | |
| 1111 return true; | |
| 1112 } | |
| 1113 return false; | |
| 1114 } | |
| 1115 | |
| 1116 | |
| 1117 bool nmethod::is_at_poll_or_poll_return(address pc) { | |
| 1118 RelocIterator iter(this, pc, pc+1); | |
| 1119 while (iter.next()) { | |
| 1120 relocInfo::relocType t = iter.type(); | |
| 1121 if (t == relocInfo::poll_return_type || t == relocInfo::poll_type) | |
| 1122 return true; | |
| 1123 } | |
| 1124 return false; | |
| 1125 } | |
| 1126 | |
| 1127 | |
| 1128 void nmethod::fix_oop_relocations(address begin, address end, bool initialize_immediates) { | |
| 1129 // re-patch all oop-bearing instructions, just in case some oops moved | |
| 1130 RelocIterator iter(this, begin, end); | |
| 1131 while (iter.next()) { | |
| 1132 if (iter.type() == relocInfo::oop_type) { | |
| 1133 oop_Relocation* reloc = iter.oop_reloc(); | |
| 1134 if (initialize_immediates && reloc->oop_is_immediate()) { | |
| 1135 oop* dest = reloc->oop_addr(); | |
| 1136 initialize_immediate_oop(dest, (jobject) *dest); | |
| 1137 } | |
| 1138 // Refresh the oop-related bits of this instruction. | |
| 1139 reloc->fix_oop_relocation(); | |
| 1140 } else if (iter.type() == relocInfo::metadata_type) { | |
| 1141 metadata_Relocation* reloc = iter.metadata_reloc(); | |
| 1142 reloc->fix_metadata_relocation(); | |
| 1143 } | |
| 1144 | |
| 1145 // There must not be any interfering patches or breakpoints. | |
| 1146 assert(!(iter.type() == relocInfo::breakpoint_type | |
| 1147 && iter.breakpoint_reloc()->active()), | |
| 1148 "no active breakpoint"); | |
| 1149 } | |
| 1150 } | |
| 1151 | |
| 1152 | |
| 1153 void nmethod::verify_oop_relocations() { | |
| 1154 // Ensure sure that the code matches the current oop values | |
| 1155 RelocIterator iter(this, NULL, NULL); | |
| 1156 while (iter.next()) { | |
| 1157 if (iter.type() == relocInfo::oop_type) { | |
| 1158 oop_Relocation* reloc = iter.oop_reloc(); | |
| 1159 if (!reloc->oop_is_immediate()) { | |
| 1160 reloc->verify_oop_relocation(); | |
| 1161 } | |
| 1162 } | |
| 1163 } | |
| 1164 } | |
| 1165 | |
| 1166 | |
| 1167 ScopeDesc* nmethod::scope_desc_at(address pc) { | |
| 1168 PcDesc* pd = pc_desc_at(pc); | |
| 1169 guarantee(pd != NULL, "scope must be present"); | |
| 1170 return new ScopeDesc(this, pd->scope_decode_offset(), | |
| 1171 pd->obj_decode_offset(), pd->should_reexecute(), pd->rethrow_exception(), | |
| 1172 pd->return_oop()); | |
| 1173 } | |
| 1174 | |
| 1175 | |
| 1176 void nmethod::clear_inline_caches() { | |
| 1177 assert(SafepointSynchronize::is_at_safepoint(), "cleaning of IC's only allowed at safepoint"); | |
| 1178 if (is_zombie()) { | |
| 1179 return; | |
| 1180 } | |
| 1181 | |
| 1182 RelocIterator iter(this); | |
| 1183 while (iter.next()) { | |
| 1184 iter.reloc()->clear_inline_cache(); | |
| 1185 } | |
| 1186 } | |
| 1187 | |
| 1188 | |
| 1189 void nmethod::cleanup_inline_caches() { | |
| 1190 | |
| 1191 assert_locked_or_safepoint(CompiledIC_lock); | |
| 1192 | |
| 1193 // If the method is not entrant or zombie then a JMP is plastered over the | |
| 1194 // first few bytes. If an oop in the old code was there, that oop | |
| 1195 // should not get GC'd. Skip the first few bytes of oops on | |
| 1196 // not-entrant methods. | |
| 1197 address low_boundary = verified_entry_point(); | |
| 1198 if (!is_in_use()) { | |
| 1199 low_boundary += NativeJump::instruction_size; | |
| 1200 // %%% Note: On SPARC we patch only a 4-byte trap, not a full NativeJump. | |
| 1201 // This means that the low_boundary is going to be a little too high. | |
| 1202 // This shouldn't matter, since oops of non-entrant methods are never used. | |
| 1203 // In fact, why are we bothering to look at oops in a non-entrant method?? | |
| 1204 } | |
| 1205 | |
| 1206 // Find all calls in an nmethod, and clear the ones that points to zombie methods | |
| 1207 ResourceMark rm; | |
| 1208 RelocIterator iter(this, low_boundary); | |
| 1209 while(iter.next()) { | |
| 1210 switch(iter.type()) { | |
| 1211 case relocInfo::virtual_call_type: | |
| 1212 case relocInfo::opt_virtual_call_type: { | |
| 1213 CompiledIC *ic = CompiledIC_at(iter.reloc()); | |
| 1214 // Ok, to lookup references to zombies here | |
| 1215 CodeBlob *cb = CodeCache::find_blob_unsafe(ic->ic_destination()); | |
| 1216 if( cb != NULL && cb->is_nmethod() ) { | |
| 1217 nmethod* nm = (nmethod*)cb; | |
| 1218 // Clean inline caches pointing to both zombie and not_entrant methods | |
| 1219 if (!nm->is_in_use() || (nm->method()->code() != nm)) ic->set_to_clean(); | |
| 1220 } | |
| 1221 break; | |
| 1222 } | |
| 1223 case relocInfo::static_call_type: { | |
| 1224 CompiledStaticCall *csc = compiledStaticCall_at(iter.reloc()); | |
| 1225 CodeBlob *cb = CodeCache::find_blob_unsafe(csc->destination()); | |
| 1226 if( cb != NULL && cb->is_nmethod() ) { | |
| 1227 nmethod* nm = (nmethod*)cb; | |
| 1228 // Clean inline caches pointing to both zombie and not_entrant methods | |
| 1229 if (!nm->is_in_use() || (nm->method()->code() != nm)) csc->set_to_clean(); | |
| 1230 } | |
| 1231 break; | |
| 1232 } | |
| 1233 } | |
| 1234 } | |
| 1235 } | |
| 1236 | |
| 1237 // This is a private interface with the sweeper. | |
| 1238 void nmethod::mark_as_seen_on_stack() { | |
| 1239 assert(is_not_entrant(), "must be a non-entrant method"); | |
| 1240 // Set the traversal mark to ensure that the sweeper does 2 | |
| 1241 // cleaning passes before moving to zombie. | |
| 1242 set_stack_traversal_mark(NMethodSweeper::traversal_count()); | |
| 1243 } | |
| 1244 | |
| 1245 // Tell if a non-entrant method can be converted to a zombie (i.e., | |
| 1246 // there are no activations on the stack, not in use by the VM, | |
| 1247 // and not in use by the ServiceThread) | |
| 1248 bool nmethod::can_not_entrant_be_converted() { | |
| 1249 assert(is_not_entrant(), "must be a non-entrant method"); | |
| 1250 | |
| 1251 // Since the nmethod sweeper only does partial sweep the sweeper's traversal | |
| 1252 // count can be greater than the stack traversal count before it hits the | |
| 1253 // nmethod for the second time. | |
| 1254 return stack_traversal_mark()+1 < NMethodSweeper::traversal_count() && | |
| 1255 !is_locked_by_vm(); | |
| 1256 } | |
| 1257 | |
| 1258 void nmethod::inc_decompile_count() { | |
| 1259 if (!is_compiled_by_c2() && !is_compiled_by_graal()) return; | |
| 1260 // Could be gated by ProfileTraps, but do not bother... | |
| 1261 Method* m = method(); | |
| 1262 if (m == NULL) return; | |
| 1263 MethodData* mdo = m->method_data(); | |
| 1264 if (mdo == NULL) return; | |
| 1265 // There is a benign race here. See comments in methodData.hpp. | |
| 1266 mdo->inc_decompile_count(); | |
| 1267 } | |
| 1268 | |
| 1269 void nmethod::make_unloaded(BoolObjectClosure* is_alive, oop cause) { | |
| 1270 | |
| 1271 post_compiled_method_unload(); | |
| 1272 | |
| 1273 // Since this nmethod is being unloaded, make sure that dependencies | |
| 1274 // recorded in instanceKlasses get flushed and pass non-NULL closure to | |
| 1275 // indicate that this work is being done during a GC. | |
| 1276 assert(Universe::heap()->is_gc_active(), "should only be called during gc"); | |
| 1277 assert(is_alive != NULL, "Should be non-NULL"); | |
| 1278 // A non-NULL is_alive closure indicates that this is being called during GC. | |
| 1279 flush_dependencies(is_alive); | |
| 1280 | |
| 1281 // Break cycle between nmethod & method | |
| 1282 if (TraceClassUnloading && WizardMode) { | |
| 1283 tty->print_cr("[Class unloading: Making nmethod " INTPTR_FORMAT | |
| 1284 " unloadable], Method*(" INTPTR_FORMAT | |
| 1285 "), cause(" INTPTR_FORMAT ")", | |
| 1286 this, (address)_method, (address)cause); | |
| 1287 if (!Universe::heap()->is_gc_active()) | |
| 1288 cause->klass()->print(); | |
| 1289 } | |
| 1290 // Unlink the osr method, so we do not look this up again | |
| 1291 if (is_osr_method()) { | |
| 1292 invalidate_osr_method(); | |
| 1293 } | |
| 1294 // If _method is already NULL the Method* is about to be unloaded, | |
| 1295 // so we don't have to break the cycle. Note that it is possible to | |
| 1296 // have the Method* live here, in case we unload the nmethod because | |
| 1297 // it is pointing to some oop (other than the Method*) being unloaded. | |
| 1298 if (_method != NULL) { | |
| 1299 // OSR methods point to the Method*, but the Method* does not | |
| 1300 // point back! | |
| 1301 if (_method->code() == this) { | |
| 1302 _method->clear_code(); // Break a cycle | |
| 1303 } | |
| 1304 _method = NULL; // Clear the method of this dead nmethod | |
| 1305 } | |
| 1306 | |
| 1307 #ifdef GRAAL | |
| 1308 // The method can only be unloaded after the pointer to the installed code | |
| 1309 // Java wrapper is no longer alive. Here we need to clear out this weak | |
| 1310 // reference to the dead object. | |
| 1311 if (_graal_installed_code != NULL) { | |
| 1312 _graal_installed_code = NULL; | |
| 1313 } | |
| 1314 #endif | |
| 1315 | |
| 1316 // Make the class unloaded - i.e., change state and notify sweeper | |
| 1317 assert(SafepointSynchronize::is_at_safepoint(), "must be at safepoint"); | |
| 1318 if (is_in_use()) { | |
| 1319 // Transitioning directly from live to unloaded -- so | |
| 1320 // we need to force a cache clean-up; remember this | |
| 1321 // for later on. | |
| 1322 CodeCache::set_needs_cache_clean(true); | |
| 1323 } | |
| 1324 _state = unloaded; | |
| 1325 | |
| 1326 // Log the unloading. | |
| 1327 log_state_change(); | |
| 1328 | |
| 1329 // The Method* is gone at this point | |
| 1330 assert(_method == NULL, "Tautology"); | |
| 1331 | |
| 1332 set_osr_link(NULL); | |
| 1333 //set_scavenge_root_link(NULL); // done by prune_scavenge_root_nmethods | |
| 1334 NMethodSweeper::notify(this); | |
| 1335 } | |
| 1336 | |
| 1337 void nmethod::invalidate_osr_method() { | |
| 1338 assert(_entry_bci != InvocationEntryBci, "wrong kind of nmethod"); | |
| 1339 // Remove from list of active nmethods | |
| 1340 if (method() != NULL) | |
| 1341 method()->method_holder()->remove_osr_nmethod(this); | |
| 1342 // Set entry as invalid | |
| 1343 _entry_bci = InvalidOSREntryBci; | |
| 1344 } | |
| 1345 | |
| 1346 void nmethod::log_state_change() const { | |
| 1347 if (LogCompilation) { | |
| 1348 if (xtty != NULL) { | |
| 1349 ttyLocker ttyl; // keep the following output all in one block | |
| 1350 if (_state == unloaded) { | |
| 1351 xtty->begin_elem("make_unloaded thread='" UINTX_FORMAT "'", | |
| 1352 os::current_thread_id()); | |
| 1353 } else { | |
| 1354 xtty->begin_elem("make_not_entrant thread='" UINTX_FORMAT "'%s", | |
| 1355 os::current_thread_id(), | |
| 1356 (_state == zombie ? " zombie='1'" : "")); | |
| 1357 } | |
| 1358 log_identity(xtty); | |
| 1359 xtty->stamp(); | |
| 1360 xtty->end_elem(); | |
| 1361 } | |
| 1362 } | |
| 1363 if (PrintCompilation && _state != unloaded) { | |
| 1364 print_on(tty, _state == zombie ? "made zombie" : "made not entrant"); | |
| 1365 } | |
| 1366 } | |
| 1367 | |
| 1368 // Common functionality for both make_not_entrant and make_zombie | |
| 1369 bool nmethod::make_not_entrant_or_zombie(unsigned int state) { | |
| 1370 assert(state == zombie || state == not_entrant, "must be zombie or not_entrant"); | |
| 1371 assert(!is_zombie(), "should not already be a zombie"); | |
| 1372 | |
| 1373 // Make sure neither the nmethod nor the method is flushed in case of a safepoint in code below. | |
| 1374 nmethodLocker nml(this); | |
| 1375 methodHandle the_method(method()); | |
| 1376 No_Safepoint_Verifier nsv; | |
| 1377 | |
| 1378 { | |
| 1379 // invalidate osr nmethod before acquiring the patching lock since | |
| 1380 // they both acquire leaf locks and we don't want a deadlock. | |
| 1381 // This logic is equivalent to the logic below for patching the | |
| 1382 // verified entry point of regular methods. | |
| 1383 if (is_osr_method()) { | |
| 1384 // this effectively makes the osr nmethod not entrant | |
| 1385 invalidate_osr_method(); | |
| 1386 } | |
| 1387 | |
| 1388 // Enter critical section. Does not block for safepoint. | |
| 1389 MutexLockerEx pl(Patching_lock, Mutex::_no_safepoint_check_flag); | |
| 1390 | |
| 1391 if (_state == state) { | |
| 1392 // another thread already performed this transition so nothing | |
| 1393 // to do, but return false to indicate this. | |
| 1394 return false; | |
| 1395 } | |
| 1396 | |
| 1397 // The caller can be calling the method statically or through an inline | |
| 1398 // cache call. | |
| 1399 if (!is_osr_method() && !is_not_entrant()) { | |
| 1400 address stub = SharedRuntime::get_handle_wrong_method_stub(); | |
| 1401 #ifdef GRAAL | |
| 1402 if (_graal_installed_code != NULL && !HotSpotNmethod::isDefault(_graal_installed_code)) { | |
| 1403 // This was manually installed machine code. Patch entry with stub that throws an exception. | |
| 1404 stub = SharedRuntime::get_deoptimized_installed_code_stub(); | |
| 1405 } | |
| 1406 #endif | |
| 1407 NativeJump::patch_verified_entry(entry_point(), verified_entry_point(), stub); | |
| 1408 } | |
| 1409 | |
| 1410 if (is_in_use()) { | |
| 1411 // It's a true state change, so mark the method as decompiled. | |
| 1412 // Do it only for transition from alive. | |
| 1413 inc_decompile_count(); | |
| 1414 } | |
| 1415 | |
| 1416 // Change state | |
| 1417 _state = state; | |
| 1418 | |
| 1419 // Log the transition once | |
| 1420 log_state_change(); | |
| 1421 | |
| 1422 // Remove nmethod from method. | |
| 1423 // We need to check if both the _code and _from_compiled_code_entry_point | |
| 1424 // refer to this nmethod because there is a race in setting these two fields | |
| 1425 // in Method* as seen in bugid 4947125. | |
| 1426 // If the vep() points to the zombie nmethod, the memory for the nmethod | |
| 1427 // could be flushed and the compiler and vtable stubs could still call | |
| 1428 // through it. | |
| 1429 if (method() != NULL && (method()->code() == this || | |
| 1430 method()->from_compiled_entry() == verified_entry_point())) { | |
| 1431 HandleMark hm; | |
| 1432 method()->clear_code(); | |
| 1433 } | |
| 1434 | |
| 1435 if (state == not_entrant) { | |
| 1436 mark_as_seen_on_stack(); | |
| 1437 } | |
| 1438 | |
| 1439 } // leave critical region under Patching_lock | |
| 1440 | |
| 1441 // When the nmethod becomes zombie it is no longer alive so the | |
| 1442 // dependencies must be flushed. nmethods in the not_entrant | |
| 1443 // state will be flushed later when the transition to zombie | |
| 1444 // happens or they get unloaded. | |
| 1445 if (state == zombie) { | |
| 1446 { | |
| 1447 // Flushing dependecies must be done before any possible | |
| 1448 // safepoint can sneak in, otherwise the oops used by the | |
| 1449 // dependency logic could have become stale. | |
| 1450 MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag); | |
| 1451 flush_dependencies(NULL); | |
| 1452 } | |
| 1453 | |
| 1454 // zombie only - if a JVMTI agent has enabled the CompiledMethodUnload | |
| 1455 // event and it hasn't already been reported for this nmethod then | |
| 1456 // report it now. The event may have been reported earilier if the GC | |
| 1457 // marked it for unloading). JvmtiDeferredEventQueue support means | |
| 1458 // we no longer go to a safepoint here. | |
| 1459 post_compiled_method_unload(); | |
| 1460 | |
| 1461 #ifdef ASSERT | |
| 1462 // It's no longer safe to access the oops section since zombie | |
| 1463 // nmethods aren't scanned for GC. | |
| 1464 _oops_are_stale = true; | |
| 1465 #endif | |
| 1466 } else { | |
| 1467 assert(state == not_entrant, "other cases may need to be handled differently"); | |
| 1468 } | |
| 1469 | |
| 1470 if (TraceCreateZombies) { | |
| 1471 ResourceMark m; | |
| 1472 tty->print_cr("nmethod <" INTPTR_FORMAT "> %s code made %s", this, this->method()->name_and_sig_as_C_string(), (state == not_entrant) ? "not entrant" : "zombie"); | |
| 1473 } | |
| 1474 | |
| 1475 // Make sweeper aware that there is a zombie method that needs to be removed | |
| 1476 NMethodSweeper::notify(this); | |
| 1477 | |
| 1478 return true; | |
| 1479 } | |
| 1480 | |
| 1481 void nmethod::flush() { | |
| 1482 // Note that there are no valid oops in the nmethod anymore. | |
| 1483 assert(is_zombie() || (is_osr_method() && is_unloaded()), "must be a zombie method"); | |
| 1484 assert(is_marked_for_reclamation() || (is_osr_method() && is_unloaded()), "must be marked for reclamation"); | |
| 1485 | |
| 1486 assert (!is_locked_by_vm(), "locked methods shouldn't be flushed"); | |
| 1487 assert_locked_or_safepoint(CodeCache_lock); | |
| 1488 | |
| 1489 // completely deallocate this method | |
| 1490 Events::log(JavaThread::current(), "flushing nmethod " INTPTR_FORMAT, this); | |
| 1491 if (PrintMethodFlushing) { | |
| 1492 tty->print_cr("*flushing nmethod %3d/" INTPTR_FORMAT ". Live blobs:" UINT32_FORMAT "/Free CodeCache:" SIZE_FORMAT "Kb", | |
| 1493 _compile_id, this, CodeCache::nof_blobs(), CodeCache::unallocated_capacity()/1024); | |
| 1494 } | |
| 1495 | |
| 1496 // We need to deallocate any ExceptionCache data. | |
| 1497 // Note that we do not need to grab the nmethod lock for this, it | |
| 1498 // better be thread safe if we're disposing of it! | |
| 1499 ExceptionCache* ec = exception_cache(); | |
| 1500 set_exception_cache(NULL); | |
| 1501 while(ec != NULL) { | |
| 1502 ExceptionCache* next = ec->next(); | |
| 1503 delete ec; | |
| 1504 ec = next; | |
| 1505 } | |
| 1506 | |
| 1507 if (on_scavenge_root_list()) { | |
| 1508 CodeCache::drop_scavenge_root_nmethod(this); | |
| 1509 } | |
| 1510 | |
| 1511 if (is_speculatively_disconnected()) { | |
| 1512 CodeCache::remove_saved_code(this); | |
| 1513 } | |
| 1514 | |
| 1515 #ifdef SHARK | |
| 1516 ((SharkCompiler *) compiler())->free_compiled_method(insts_begin()); | |
| 1517 #endif // SHARK | |
| 1518 | |
| 1519 ((CodeBlob*)(this))->flush(); | |
| 1520 | |
| 1521 CodeCache::free(this); | |
| 1522 } | |
| 1523 | |
| 1524 | |
| 1525 // | |
| 1526 // Notify all classes this nmethod is dependent on that it is no | |
| 1527 // longer dependent. This should only be called in two situations. | |
| 1528 // First, when a nmethod transitions to a zombie all dependents need | |
| 1529 // to be clear. Since zombification happens at a safepoint there's no | |
| 1530 // synchronization issues. The second place is a little more tricky. | |
| 1531 // During phase 1 of mark sweep class unloading may happen and as a | |
| 1532 // result some nmethods may get unloaded. In this case the flushing | |
| 1533 // of dependencies must happen during phase 1 since after GC any | |
| 1534 // dependencies in the unloaded nmethod won't be updated, so | |
| 1535 // traversing the dependency information in unsafe. In that case this | |
| 1536 // function is called with a non-NULL argument and this function only | |
| 1537 // notifies instanceKlasses that are reachable | |
| 1538 | |
| 1539 void nmethod::flush_dependencies(BoolObjectClosure* is_alive) { | |
| 1540 assert_locked_or_safepoint(CodeCache_lock); | |
| 1541 assert(Universe::heap()->is_gc_active() == (is_alive != NULL), | |
| 1542 "is_alive is non-NULL if and only if we are called during GC"); | |
| 1543 if (!has_flushed_dependencies()) { | |
| 1544 set_has_flushed_dependencies(); | |
| 1545 for (Dependencies::DepStream deps(this); deps.next(); ) { | |
| 1546 Klass* klass = deps.context_type(); | |
| 1547 if (klass == NULL) continue; // ignore things like evol_method | |
| 1548 | |
| 1549 // During GC the is_alive closure is non-NULL, and is used to | |
| 1550 // determine liveness of dependees that need to be updated. | |
| 1551 if (is_alive == NULL || klass->is_loader_alive(is_alive)) { | |
| 1552 InstanceKlass::cast(klass)->remove_dependent_nmethod(this); | |
| 1553 } | |
| 1554 } | |
| 1555 } | |
| 1556 } | |
| 1557 | |
| 1558 | |
| 1559 // If this oop is not live, the nmethod can be unloaded. | |
| 1560 bool nmethod::can_unload(BoolObjectClosure* is_alive, oop* root, bool unloading_occurred) { | |
| 1561 assert(root != NULL, "just checking"); | |
| 1562 oop obj = *root; | |
| 1563 if (obj == NULL || is_alive->do_object_b(obj)) { | |
| 1564 return false; | |
| 1565 } | |
| 1566 | |
| 1567 // If ScavengeRootsInCode is true, an nmethod might be unloaded | |
| 1568 // simply because one of its constant oops has gone dead. | |
| 1569 // No actual classes need to be unloaded in order for this to occur. | |
| 1570 assert(unloading_occurred || ScavengeRootsInCode, "Inconsistency in unloading"); | |
| 1571 make_unloaded(is_alive, obj); | |
| 1572 return true; | |
| 1573 } | |
| 1574 | |
| 1575 // ------------------------------------------------------------------ | |
| 1576 // post_compiled_method_load_event | |
| 1577 // new method for install_code() path | |
| 1578 // Transfer information from compilation to jvmti | |
| 1579 void nmethod::post_compiled_method_load_event() { | |
| 1580 | |
| 1581 Method* moop = method(); | |
| 1582 #ifndef USDT2 | |
| 1583 HS_DTRACE_PROBE8(hotspot, compiled__method__load, | |
| 1584 moop->klass_name()->bytes(), | |
| 1585 moop->klass_name()->utf8_length(), | |
| 1586 moop->name()->bytes(), | |
| 1587 moop->name()->utf8_length(), | |
| 1588 moop->signature()->bytes(), | |
| 1589 moop->signature()->utf8_length(), | |
| 1590 insts_begin(), insts_size()); | |
| 1591 #else /* USDT2 */ | |
| 1592 HOTSPOT_COMPILED_METHOD_LOAD( | |
| 1593 (char *) moop->klass_name()->bytes(), | |
| 1594 moop->klass_name()->utf8_length(), | |
| 1595 (char *) moop->name()->bytes(), | |
| 1596 moop->name()->utf8_length(), | |
| 1597 (char *) moop->signature()->bytes(), | |
| 1598 moop->signature()->utf8_length(), | |
| 1599 insts_begin(), insts_size()); | |
| 1600 #endif /* USDT2 */ | |
| 1601 | |
| 1602 if (JvmtiExport::should_post_compiled_method_load() || | |
| 1603 JvmtiExport::should_post_compiled_method_unload()) { | |
| 1604 get_and_cache_jmethod_id(); | |
| 1605 } | |
| 1606 | |
| 1607 if (JvmtiExport::should_post_compiled_method_load()) { | |
| 1608 // Let the Service thread (which is a real Java thread) post the event | |
| 1609 MutexLockerEx ml(Service_lock, Mutex::_no_safepoint_check_flag); | |
| 1610 JvmtiDeferredEventQueue::enqueue( | |
| 1611 JvmtiDeferredEvent::compiled_method_load_event(this)); | |
| 1612 } | |
| 1613 } | |
| 1614 | |
| 1615 jmethodID nmethod::get_and_cache_jmethod_id() { | |
| 1616 if (_jmethod_id == NULL) { | |
| 1617 // Cache the jmethod_id since it can no longer be looked up once the | |
| 1618 // method itself has been marked for unloading. | |
| 1619 _jmethod_id = method()->jmethod_id(); | |
| 1620 } | |
| 1621 return _jmethod_id; | |
| 1622 } | |
| 1623 | |
| 1624 void nmethod::post_compiled_method_unload() { | |
| 1625 if (unload_reported()) { | |
| 1626 // During unloading we transition to unloaded and then to zombie | |
| 1627 // and the unloading is reported during the first transition. | |
| 1628 return; | |
| 1629 } | |
| 1630 | |
| 1631 assert(_method != NULL && !is_unloaded(), "just checking"); | |
| 1632 DTRACE_METHOD_UNLOAD_PROBE(method()); | |
| 1633 | |
| 1634 // If a JVMTI agent has enabled the CompiledMethodUnload event then | |
| 1635 // post the event. Sometime later this nmethod will be made a zombie | |
| 1636 // by the sweeper but the Method* will not be valid at that point. | |
| 1637 // If the _jmethod_id is null then no load event was ever requested | |
| 1638 // so don't bother posting the unload. The main reason for this is | |
| 1639 // that the jmethodID is a weak reference to the Method* so if | |
| 1640 // it's being unloaded there's no way to look it up since the weak | |
| 1641 // ref will have been cleared. | |
| 1642 if (_jmethod_id != NULL && JvmtiExport::should_post_compiled_method_unload()) { | |
| 1643 assert(!unload_reported(), "already unloaded"); | |
| 1644 JvmtiDeferredEvent event = | |
| 1645 JvmtiDeferredEvent::compiled_method_unload_event(this, | |
| 1646 _jmethod_id, insts_begin()); | |
| 1647 if (SafepointSynchronize::is_at_safepoint()) { | |
| 1648 // Don't want to take the queueing lock. Add it as pending and | |
| 1649 // it will get enqueued later. | |
| 1650 JvmtiDeferredEventQueue::add_pending_event(event); | |
| 1651 } else { | |
| 1652 MutexLockerEx ml(Service_lock, Mutex::_no_safepoint_check_flag); | |
| 1653 JvmtiDeferredEventQueue::enqueue(event); | |
| 1654 } | |
| 1655 } | |
| 1656 | |
| 1657 // The JVMTI CompiledMethodUnload event can be enabled or disabled at | |
| 1658 // any time. As the nmethod is being unloaded now we mark it has | |
| 1659 // having the unload event reported - this will ensure that we don't | |
| 1660 // attempt to report the event in the unlikely scenario where the | |
| 1661 // event is enabled at the time the nmethod is made a zombie. | |
| 1662 set_unload_reported(); | |
| 1663 } | |
| 1664 | |
| 1665 // This is called at the end of the strong tracing/marking phase of a | |
| 1666 // GC to unload an nmethod if it contains otherwise unreachable | |
| 1667 // oops. | |
| 1668 | |
| 1669 void nmethod::do_unloading(BoolObjectClosure* is_alive, bool unloading_occurred) { | |
| 1670 // Make sure the oop's ready to receive visitors | |
| 1671 assert(!is_zombie() && !is_unloaded(), | |
| 1672 "should not call follow on zombie or unloaded nmethod"); | |
| 1673 | |
| 1674 // If the method is not entrant then a JMP is plastered over the | |
| 1675 // first few bytes. If an oop in the old code was there, that oop | |
| 1676 // should not get GC'd. Skip the first few bytes of oops on | |
| 1677 // not-entrant methods. | |
| 1678 address low_boundary = verified_entry_point(); | |
| 1679 if (is_not_entrant()) { | |
| 1680 low_boundary += NativeJump::instruction_size; | |
| 1681 // %%% Note: On SPARC we patch only a 4-byte trap, not a full NativeJump. | |
| 1682 // (See comment above.) | |
| 1683 } | |
| 1684 | |
| 1685 // The RedefineClasses() API can cause the class unloading invariant | |
| 1686 // to no longer be true. See jvmtiExport.hpp for details. | |
| 1687 // Also, leave a debugging breadcrumb in local flag. | |
| 1688 bool a_class_was_redefined = JvmtiExport::has_redefined_a_class(); | |
| 1689 if (a_class_was_redefined) { | |
| 1690 // This set of the unloading_occurred flag is done before the | |
| 1691 // call to post_compiled_method_unload() so that the unloading | |
| 1692 // of this nmethod is reported. | |
| 1693 unloading_occurred = true; | |
| 1694 } | |
| 1695 | |
| 1696 #ifdef GRAAL | |
| 1697 // Follow Graal method | |
| 1698 if (_graal_installed_code != NULL) { | |
| 1699 if (HotSpotNmethod::isDefault(_graal_installed_code)) { | |
| 1700 if (!is_alive->do_object_b(_graal_installed_code)) { | |
| 1701 _graal_installed_code = NULL; | |
| 1702 } | |
| 1703 } else { | |
| 1704 if (can_unload(is_alive, (oop*)&_graal_installed_code, unloading_occurred)) { | |
| 1705 return; | |
| 1706 } | |
| 1707 } | |
| 1708 } | |
| 1709 #endif | |
| 1710 | |
| 1711 // Exception cache | |
| 1712 ExceptionCache* ec = exception_cache(); | |
| 1713 while (ec != NULL) { | |
| 1714 Klass* ex_klass = ec->exception_type(); | |
| 1715 ExceptionCache* next_ec = ec->next(); | |
| 1716 if (ex_klass != NULL && !ex_klass->is_loader_alive(is_alive)) { | |
| 1717 remove_from_exception_cache(ec); | |
| 1718 } | |
| 1719 ec = next_ec; | |
| 1720 } | |
| 1721 | |
| 1722 // If class unloading occurred we first iterate over all inline caches and | |
| 1723 // clear ICs where the cached oop is referring to an unloaded klass or method. | |
| 1724 // The remaining live cached oops will be traversed in the relocInfo::oop_type | |
| 1725 // iteration below. | |
| 1726 if (unloading_occurred) { | |
| 1727 RelocIterator iter(this, low_boundary); | |
| 1728 while(iter.next()) { | |
| 1729 if (iter.type() == relocInfo::virtual_call_type) { | |
| 1730 CompiledIC *ic = CompiledIC_at(iter.reloc()); | |
| 1731 if (ic->is_icholder_call()) { | |
| 1732 // The only exception is compiledICHolder oops which may | |
| 1733 // yet be marked below. (We check this further below). | |
| 1734 CompiledICHolder* cichk_oop = ic->cached_icholder(); | |
| 1735 if (cichk_oop->holder_method()->method_holder()->is_loader_alive(is_alive) && | |
| 1736 cichk_oop->holder_klass()->is_loader_alive(is_alive)) { | |
| 1737 continue; | |
| 1738 } | |
| 1739 } else { | |
| 1740 Metadata* ic_oop = ic->cached_metadata(); | |
| 1741 if (ic_oop != NULL) { | |
| 1742 if (ic_oop->is_klass()) { | |
| 1743 if (((Klass*)ic_oop)->is_loader_alive(is_alive)) { | |
| 1744 continue; | |
| 1745 } | |
| 1746 } else if (ic_oop->is_method()) { | |
| 1747 if (((Method*)ic_oop)->method_holder()->is_loader_alive(is_alive)) { | |
| 1748 continue; | |
| 1749 } | |
| 1750 } else { | |
| 1751 ShouldNotReachHere(); | |
| 1752 } | |
| 1753 } | |
| 1754 } | |
| 1755 ic->set_to_clean(); | |
| 1756 } | |
| 1757 } | |
| 1758 } | |
| 1759 | |
| 1760 // Compiled code | |
| 1761 { | |
| 1762 RelocIterator iter(this, low_boundary); | |
| 1763 while (iter.next()) { | |
| 1764 if (iter.type() == relocInfo::oop_type) { | |
| 1765 oop_Relocation* r = iter.oop_reloc(); | |
| 1766 // In this loop, we must only traverse those oops directly embedded in | |
| 1767 // the code. Other oops (oop_index>0) are seen as part of scopes_oops. | |
| 1768 assert(1 == (r->oop_is_immediate()) + | |
| 1769 (r->oop_addr() >= oops_begin() && r->oop_addr() < oops_end()), | |
| 1770 "oop must be found in exactly one place"); | |
| 1771 if (r->oop_is_immediate() && r->oop_value() != NULL) { | |
| 1772 if (can_unload(is_alive, r->oop_addr(), unloading_occurred)) { | |
| 1773 return; | |
| 1774 } | |
| 1775 } | |
| 1776 } | |
| 1777 } | |
| 1778 } | |
| 1779 | |
| 1780 | |
| 1781 // Scopes | |
| 1782 for (oop* p = oops_begin(); p < oops_end(); p++) { | |
| 1783 if (*p == Universe::non_oop_word()) continue; // skip non-oops | |
| 1784 if (can_unload(is_alive, p, unloading_occurred)) { | |
| 1785 return; | |
| 1786 } | |
| 1787 } | |
| 1788 | |
| 1789 // Ensure that all metadata is still alive | |
| 1790 verify_metadata_loaders(low_boundary, is_alive); | |
| 1791 } | |
| 1792 | |
| 1793 #ifdef ASSERT | |
| 1794 | |
| 1795 class CheckClass : AllStatic { | |
| 1796 static BoolObjectClosure* _is_alive; | |
| 1797 | |
| 1798 // Check class_loader is alive for this bit of metadata. | |
| 1799 static void check_class(Metadata* md) { | |
| 1800 Klass* klass = NULL; | |
| 1801 if (md->is_klass()) { | |
| 1802 klass = ((Klass*)md); | |
| 1803 } else if (md->is_method()) { | |
| 1804 klass = ((Method*)md)->method_holder(); | |
| 1805 } else if (md->is_methodData()) { | |
| 1806 klass = ((MethodData*)md)->method()->method_holder(); | |
| 1807 } else { | |
| 1808 md->print(); | |
| 1809 ShouldNotReachHere(); | |
| 1810 } | |
| 1811 assert(klass->is_loader_alive(_is_alive), "must be alive"); | |
| 1812 } | |
| 1813 public: | |
| 1814 static void do_check_class(BoolObjectClosure* is_alive, nmethod* nm) { | |
| 1815 assert(SafepointSynchronize::is_at_safepoint(), "this is only ok at safepoint"); | |
| 1816 _is_alive = is_alive; | |
| 1817 nm->metadata_do(check_class); | |
| 1818 } | |
| 1819 }; | |
| 1820 | |
| 1821 // This is called during a safepoint so can use static data | |
| 1822 BoolObjectClosure* CheckClass::_is_alive = NULL; | |
| 1823 #endif // ASSERT | |
| 1824 | |
| 1825 | |
| 1826 // Processing of oop references should have been sufficient to keep | |
| 1827 // all strong references alive. Any weak references should have been | |
| 1828 // cleared as well. Visit all the metadata and ensure that it's | |
| 1829 // really alive. | |
| 1830 void nmethod::verify_metadata_loaders(address low_boundary, BoolObjectClosure* is_alive) { | |
| 1831 #ifdef ASSERT | |
| 1832 RelocIterator iter(this, low_boundary); | |
| 1833 while (iter.next()) { | |
| 1834 // static_stub_Relocations may have dangling references to | |
| 1835 // Method*s so trim them out here. Otherwise it looks like | |
| 1836 // compiled code is maintaining a link to dead metadata. | |
| 1837 address static_call_addr = NULL; | |
| 1838 if (iter.type() == relocInfo::opt_virtual_call_type) { | |
| 1839 CompiledIC* cic = CompiledIC_at(iter.reloc()); | |
| 1840 if (!cic->is_call_to_interpreted()) { | |
| 1841 static_call_addr = iter.addr(); | |
| 1842 } | |
| 1843 } else if (iter.type() == relocInfo::static_call_type) { | |
| 1844 CompiledStaticCall* csc = compiledStaticCall_at(iter.reloc()); | |
| 1845 if (!csc->is_call_to_interpreted()) { | |
| 1846 static_call_addr = iter.addr(); | |
| 1847 } | |
| 1848 } | |
| 1849 if (static_call_addr != NULL) { | |
| 1850 RelocIterator sciter(this, low_boundary); | |
| 1851 while (sciter.next()) { | |
| 1852 if (sciter.type() == relocInfo::static_stub_type && | |
| 1853 sciter.static_stub_reloc()->static_call() == static_call_addr) { | |
| 1854 sciter.static_stub_reloc()->clear_inline_cache(); | |
| 1855 } | |
| 1856 } | |
| 1857 } | |
| 1858 } | |
| 1859 // Check that the metadata embedded in the nmethod is alive | |
| 1860 CheckClass::do_check_class(is_alive, this); | |
| 1861 #endif | |
| 1862 } | |
| 1863 | |
|
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Force GC to process graal_installed_code references during marking (GRAAL-257)
Christos Kotselidis <christos.kotselidis@oracle.com>
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changeset
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1864 #ifdef GRAAL |
|
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Force GC to process graal_installed_code references during marking (GRAAL-257)
Christos Kotselidis <christos.kotselidis@oracle.com>
parents:
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1865 void nmethod::mark_graal_reference(OopClosure* f) { |
|
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Force GC to process graal_installed_code references during marking (GRAAL-257)
Christos Kotselidis <christos.kotselidis@oracle.com>
parents:
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diff
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1866 if (_graal_installed_code != NULL) { |
|
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parents:
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1867 f->do_oop((oop*) &_graal_installed_code); |
|
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Christos Kotselidis <christos.kotselidis@oracle.com>
parents:
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|
1868 } |
|
ebb32c4589f3
Force GC to process graal_installed_code references during marking (GRAAL-257)
Christos Kotselidis <christos.kotselidis@oracle.com>
parents:
9925
diff
changeset
|
1869 } |
|
ebb32c4589f3
Force GC to process graal_installed_code references during marking (GRAAL-257)
Christos Kotselidis <christos.kotselidis@oracle.com>
parents:
9925
diff
changeset
|
1870 #endif |
| 9707 | 1871 // Iterate over metadata calling this function. Used by RedefineClasses |
| 1872 void nmethod::metadata_do(void f(Metadata*)) { | |
| 1873 address low_boundary = verified_entry_point(); | |
| 1874 if (is_not_entrant()) { | |
| 1875 low_boundary += NativeJump::instruction_size; | |
| 1876 // %%% Note: On SPARC we patch only a 4-byte trap, not a full NativeJump. | |
| 1877 // (See comment above.) | |
| 1878 } | |
| 1879 { | |
| 1880 // Visit all immediate references that are embedded in the instruction stream. | |
| 1881 RelocIterator iter(this, low_boundary); | |
| 1882 while (iter.next()) { | |
| 1883 if (iter.type() == relocInfo::metadata_type ) { | |
| 1884 metadata_Relocation* r = iter.metadata_reloc(); | |
| 1885 // In this lmetadata, we must only follow those metadatas directly embedded in | |
| 1886 // the code. Other metadatas (oop_index>0) are seen as part of | |
| 1887 // the metadata section below. | |
| 1888 assert(1 == (r->metadata_is_immediate()) + | |
| 1889 (r->metadata_addr() >= metadata_begin() && r->metadata_addr() < metadata_end()), | |
| 1890 "metadata must be found in exactly one place"); | |
| 1891 if (r->metadata_is_immediate() && r->metadata_value() != NULL) { | |
| 1892 Metadata* md = r->metadata_value(); | |
| 1893 f(md); | |
| 1894 } | |
| 1895 } | |
| 1896 } | |
| 1897 } | |
| 1898 | |
| 1899 // Visit the metadata section | |
| 1900 for (Metadata** p = metadata_begin(); p < metadata_end(); p++) { | |
| 1901 if (*p == Universe::non_oop_word() || *p == NULL) continue; // skip non-oops | |
| 1902 Metadata* md = *p; | |
| 1903 f(md); | |
| 1904 } | |
| 1905 // Call function Method*, not embedded in these other places. | |
| 1906 if (_method != NULL) f(_method); | |
| 1907 } | |
| 1908 | |
| 1909 | |
| 1910 // This method is called twice during GC -- once while | |
| 1911 // tracing the "active" nmethods on thread stacks during | |
| 1912 // the (strong) marking phase, and then again when walking | |
| 1913 // the code cache contents during the weak roots processing | |
| 1914 // phase. The two uses are distinguished by means of the | |
| 1915 // 'do_strong_roots_only' flag, which is true in the first | |
| 1916 // case. We want to walk the weak roots in the nmethod | |
| 1917 // only in the second case. The weak roots in the nmethod | |
| 1918 // are the oops in the ExceptionCache and the InlineCache | |
| 1919 // oops. | |
| 1920 void nmethod::oops_do(OopClosure* f, bool do_strong_roots_only) { | |
| 1921 // make sure the oops ready to receive visitors | |
| 1922 assert(!is_zombie() && !is_unloaded(), | |
| 1923 "should not call follow on zombie or unloaded nmethod"); | |
| 1924 | |
| 1925 // If the method is not entrant or zombie then a JMP is plastered over the | |
| 1926 // first few bytes. If an oop in the old code was there, that oop | |
| 1927 // should not get GC'd. Skip the first few bytes of oops on | |
| 1928 // not-entrant methods. | |
| 1929 address low_boundary = verified_entry_point(); | |
| 1930 if (is_not_entrant()) { | |
| 1931 low_boundary += NativeJump::instruction_size; | |
| 1932 // %%% Note: On SPARC we patch only a 4-byte trap, not a full NativeJump. | |
| 1933 // (See comment above.) | |
| 1934 } | |
| 1935 | |
| 1936 #ifdef GRAAL | |
| 1937 if (_graal_installed_code != NULL) { | |
| 1938 f->do_oop((oop*) &_graal_installed_code); | |
| 1939 } | |
| 1940 if (_triggered_deoptimizations != NULL) { | |
| 1941 f->do_oop((oop*) &_triggered_deoptimizations); | |
| 1942 } | |
| 1943 #endif | |
| 1944 | |
| 1945 RelocIterator iter(this, low_boundary); | |
| 1946 | |
| 1947 while (iter.next()) { | |
| 1948 if (iter.type() == relocInfo::oop_type ) { | |
| 1949 oop_Relocation* r = iter.oop_reloc(); | |
| 1950 // In this loop, we must only follow those oops directly embedded in | |
| 1951 // the code. Other oops (oop_index>0) are seen as part of scopes_oops. | |
| 1952 assert(1 == (r->oop_is_immediate()) + | |
| 1953 (r->oop_addr() >= oops_begin() && r->oop_addr() < oops_end()), | |
| 1954 "oop must be found in exactly one place"); | |
| 1955 if (r->oop_is_immediate() && r->oop_value() != NULL) { | |
| 1956 f->do_oop(r->oop_addr()); | |
| 1957 } | |
| 1958 } | |
| 1959 } | |
| 1960 | |
| 1961 // Scopes | |
| 1962 // This includes oop constants not inlined in the code stream. | |
| 1963 for (oop* p = oops_begin(); p < oops_end(); p++) { | |
| 1964 if (*p == Universe::non_oop_word()) continue; // skip non-oops | |
| 1965 f->do_oop(p); | |
| 1966 } | |
| 1967 } | |
| 1968 | |
| 1969 #define NMETHOD_SENTINEL ((nmethod*)badAddress) | |
| 1970 | |
| 1971 nmethod* volatile nmethod::_oops_do_mark_nmethods; | |
| 1972 | |
| 1973 // An nmethod is "marked" if its _mark_link is set non-null. | |
| 1974 // Even if it is the end of the linked list, it will have a non-null link value, | |
| 1975 // as long as it is on the list. | |
| 1976 // This code must be MP safe, because it is used from parallel GC passes. | |
| 1977 bool nmethod::test_set_oops_do_mark() { | |
| 1978 assert(nmethod::oops_do_marking_is_active(), "oops_do_marking_prologue must be called"); | |
| 1979 nmethod* observed_mark_link = _oops_do_mark_link; | |
| 1980 if (observed_mark_link == NULL) { | |
| 1981 // Claim this nmethod for this thread to mark. | |
| 1982 observed_mark_link = (nmethod*) | |
| 1983 Atomic::cmpxchg_ptr(NMETHOD_SENTINEL, &_oops_do_mark_link, NULL); | |
| 1984 if (observed_mark_link == NULL) { | |
| 1985 | |
| 1986 // Atomically append this nmethod (now claimed) to the head of the list: | |
| 1987 nmethod* observed_mark_nmethods = _oops_do_mark_nmethods; | |
| 1988 for (;;) { | |
| 1989 nmethod* required_mark_nmethods = observed_mark_nmethods; | |
| 1990 _oops_do_mark_link = required_mark_nmethods; | |
| 1991 observed_mark_nmethods = (nmethod*) | |
| 1992 Atomic::cmpxchg_ptr(this, &_oops_do_mark_nmethods, required_mark_nmethods); | |
| 1993 if (observed_mark_nmethods == required_mark_nmethods) | |
| 1994 break; | |
| 1995 } | |
| 1996 // Mark was clear when we first saw this guy. | |
| 1997 NOT_PRODUCT(if (TraceScavenge) print_on(tty, "oops_do, mark")); | |
| 1998 return false; | |
| 1999 } | |
| 2000 } | |
| 2001 // On fall through, another racing thread marked this nmethod before we did. | |
| 2002 return true; | |
| 2003 } | |
| 2004 | |
| 2005 void nmethod::oops_do_marking_prologue() { | |
| 2006 NOT_PRODUCT(if (TraceScavenge) tty->print_cr("[oops_do_marking_prologue")); | |
| 2007 assert(_oops_do_mark_nmethods == NULL, "must not call oops_do_marking_prologue twice in a row"); | |
| 2008 // We use cmpxchg_ptr instead of regular assignment here because the user | |
| 2009 // may fork a bunch of threads, and we need them all to see the same state. | |
| 2010 void* observed = Atomic::cmpxchg_ptr(NMETHOD_SENTINEL, &_oops_do_mark_nmethods, NULL); | |
| 2011 guarantee(observed == NULL, "no races in this sequential code"); | |
| 2012 } | |
| 2013 | |
| 2014 void nmethod::oops_do_marking_epilogue() { | |
| 2015 assert(_oops_do_mark_nmethods != NULL, "must not call oops_do_marking_epilogue twice in a row"); | |
| 2016 nmethod* cur = _oops_do_mark_nmethods; | |
| 2017 while (cur != NMETHOD_SENTINEL) { | |
| 2018 assert(cur != NULL, "not NULL-terminated"); | |
| 2019 nmethod* next = cur->_oops_do_mark_link; | |
| 2020 cur->_oops_do_mark_link = NULL; | |
| 2021 cur->fix_oop_relocations(); | |
| 2022 NOT_PRODUCT(if (TraceScavenge) cur->print_on(tty, "oops_do, unmark")); | |
| 2023 cur = next; | |
| 2024 } | |
| 2025 void* required = _oops_do_mark_nmethods; | |
| 2026 void* observed = Atomic::cmpxchg_ptr(NULL, &_oops_do_mark_nmethods, required); | |
| 2027 guarantee(observed == required, "no races in this sequential code"); | |
| 2028 NOT_PRODUCT(if (TraceScavenge) tty->print_cr("oops_do_marking_epilogue]")); | |
| 2029 } | |
| 2030 | |
| 2031 class DetectScavengeRoot: public OopClosure { | |
| 2032 bool _detected_scavenge_root; | |
| 2033 public: | |
| 2034 DetectScavengeRoot() : _detected_scavenge_root(false) | |
| 2035 { NOT_PRODUCT(_print_nm = NULL); } | |
| 2036 bool detected_scavenge_root() { return _detected_scavenge_root; } | |
| 2037 virtual void do_oop(oop* p) { | |
| 2038 if ((*p) != NULL && (*p)->is_scavengable()) { | |
| 2039 NOT_PRODUCT(maybe_print(p)); | |
| 2040 _detected_scavenge_root = true; | |
| 2041 } | |
| 2042 } | |
| 2043 virtual void do_oop(narrowOop* p) { ShouldNotReachHere(); } | |
| 2044 | |
| 2045 #ifndef PRODUCT | |
| 2046 nmethod* _print_nm; | |
| 2047 void maybe_print(oop* p) { | |
| 2048 if (_print_nm == NULL) return; | |
| 2049 if (!_detected_scavenge_root) _print_nm->print_on(tty, "new scavenge root"); | |
| 2050 tty->print_cr(""PTR_FORMAT"[offset=%d] detected scavengable oop "PTR_FORMAT" (found at "PTR_FORMAT")", | |
| 2051 _print_nm, (int)((intptr_t)p - (intptr_t)_print_nm), | |
| 2052 (intptr_t)(*p), (intptr_t)p); | |
| 2053 (*p)->print(); | |
| 2054 } | |
| 2055 #endif //PRODUCT | |
| 2056 }; | |
| 2057 | |
| 2058 bool nmethod::detect_scavenge_root_oops() { | |
| 2059 DetectScavengeRoot detect_scavenge_root; | |
| 2060 NOT_PRODUCT(if (TraceScavenge) detect_scavenge_root._print_nm = this); | |
| 2061 oops_do(&detect_scavenge_root); | |
| 2062 return detect_scavenge_root.detected_scavenge_root(); | |
| 2063 } | |
| 2064 | |
| 2065 // Method that knows how to preserve outgoing arguments at call. This method must be | |
| 2066 // called with a frame corresponding to a Java invoke | |
| 2067 void nmethod::preserve_callee_argument_oops(frame fr, const RegisterMap *reg_map, OopClosure* f) { | |
| 2068 #ifndef SHARK | |
| 2069 if (!method()->is_native()) { | |
| 2070 SimpleScopeDesc ssd(this, fr.pc()); | |
| 2071 Bytecode_invoke call(ssd.method(), ssd.bci()); | |
| 2072 // compiled invokedynamic call sites have an implicit receiver at | |
| 2073 // resolution time, so make sure it gets GC'ed. | |
| 2074 bool has_receiver = !call.is_invokestatic(); | |
| 2075 Symbol* signature = call.signature(); | |
| 2076 fr.oops_compiled_arguments_do(signature, has_receiver, reg_map, f); | |
| 2077 } | |
| 2078 #endif // !SHARK | |
| 2079 } | |
| 2080 | |
| 2081 | |
| 2082 oop nmethod::embeddedOop_at(u_char* p) { | |
| 2083 RelocIterator iter(this, p, p + 1); | |
| 2084 while (iter.next()) | |
| 2085 if (iter.type() == relocInfo::oop_type) { | |
| 2086 return iter.oop_reloc()->oop_value(); | |
| 2087 } | |
| 2088 return NULL; | |
| 2089 } | |
| 2090 | |
| 2091 | |
| 2092 inline bool includes(void* p, void* from, void* to) { | |
| 2093 return from <= p && p < to; | |
| 2094 } | |
| 2095 | |
| 2096 | |
| 2097 void nmethod::copy_scopes_pcs(PcDesc* pcs, int count) { | |
| 2098 assert(count >= 2, "must be sentinel values, at least"); | |
| 2099 | |
| 2100 #ifdef ASSERT | |
| 2101 // must be sorted and unique; we do a binary search in find_pc_desc() | |
| 2102 int prev_offset = pcs[0].pc_offset(); | |
| 2103 assert(prev_offset == PcDesc::lower_offset_limit, | |
| 2104 "must start with a sentinel"); | |
| 2105 for (int i = 1; i < count; i++) { | |
| 2106 int this_offset = pcs[i].pc_offset(); | |
| 2107 assert(this_offset > prev_offset, "offsets must be sorted"); | |
| 2108 prev_offset = this_offset; | |
| 2109 } | |
| 2110 assert(prev_offset == PcDesc::upper_offset_limit, | |
| 2111 "must end with a sentinel"); | |
| 2112 #endif //ASSERT | |
| 2113 | |
| 2114 // Search for MethodHandle invokes and tag the nmethod. | |
| 2115 for (int i = 0; i < count; i++) { | |
| 2116 if (pcs[i].is_method_handle_invoke()) { | |
| 2117 set_has_method_handle_invokes(true); | |
| 2118 break; | |
| 2119 } | |
| 2120 } | |
| 2121 assert(has_method_handle_invokes() == (_deoptimize_mh_offset != -1), "must have deopt mh handler"); | |
| 2122 | |
| 2123 int size = count * sizeof(PcDesc); | |
| 2124 assert(scopes_pcs_size() >= size, "oob"); | |
| 2125 memcpy(scopes_pcs_begin(), pcs, size); | |
| 2126 | |
| 2127 // Adjust the final sentinel downward. | |
| 2128 PcDesc* last_pc = &scopes_pcs_begin()[count-1]; | |
| 2129 assert(last_pc->pc_offset() == PcDesc::upper_offset_limit, "sanity"); | |
| 2130 last_pc->set_pc_offset(content_size() + 1); | |
| 2131 for (; last_pc + 1 < scopes_pcs_end(); last_pc += 1) { | |
| 2132 // Fill any rounding gaps with copies of the last record. | |
| 2133 last_pc[1] = last_pc[0]; | |
| 2134 } | |
| 2135 // The following assert could fail if sizeof(PcDesc) is not | |
| 2136 // an integral multiple of oopSize (the rounding term). | |
| 2137 // If it fails, change the logic to always allocate a multiple | |
| 2138 // of sizeof(PcDesc), and fill unused words with copies of *last_pc. | |
| 2139 assert(last_pc + 1 == scopes_pcs_end(), "must match exactly"); | |
| 2140 } | |
| 2141 | |
| 2142 void nmethod::copy_scopes_data(u_char* buffer, int size) { | |
| 2143 assert(scopes_data_size() >= size, "oob"); | |
| 2144 memcpy(scopes_data_begin(), buffer, size); | |
| 2145 } | |
| 2146 | |
| 2147 | |
| 2148 #ifdef ASSERT | |
| 2149 static PcDesc* linear_search(nmethod* nm, int pc_offset, bool approximate) { | |
| 2150 PcDesc* lower = nm->scopes_pcs_begin(); | |
| 2151 PcDesc* upper = nm->scopes_pcs_end(); | |
| 2152 lower += 1; // exclude initial sentinel | |
| 2153 PcDesc* res = NULL; | |
| 2154 for (PcDesc* p = lower; p < upper; p++) { | |
| 2155 NOT_PRODUCT(--nmethod_stats.pc_desc_tests); // don't count this call to match_desc | |
| 2156 if (match_desc(p, pc_offset, approximate)) { | |
| 2157 if (res == NULL) | |
| 2158 res = p; | |
| 2159 else | |
| 2160 res = (PcDesc*) badAddress; | |
| 2161 } | |
| 2162 } | |
| 2163 return res; | |
| 2164 } | |
| 2165 #endif | |
| 2166 | |
| 2167 | |
| 2168 // Finds a PcDesc with real-pc equal to "pc" | |
| 2169 PcDesc* nmethod::find_pc_desc_internal(address pc, bool approximate) { | |
| 2170 address base_address = code_begin(); | |
| 2171 if ((pc < base_address) || | |
| 2172 (pc - base_address) >= (ptrdiff_t) PcDesc::upper_offset_limit) { | |
| 2173 return NULL; // PC is wildly out of range | |
| 2174 } | |
| 2175 int pc_offset = (int) (pc - base_address); | |
| 2176 | |
| 2177 // Check the PcDesc cache if it contains the desired PcDesc | |
| 2178 // (This as an almost 100% hit rate.) | |
| 2179 PcDesc* res = _pc_desc_cache.find_pc_desc(pc_offset, approximate); | |
| 2180 if (res != NULL) { | |
| 2181 assert(res == linear_search(this, pc_offset, approximate), "cache ok"); | |
| 2182 return res; | |
| 2183 } | |
| 2184 | |
| 2185 // Fallback algorithm: quasi-linear search for the PcDesc | |
| 2186 // Find the last pc_offset less than the given offset. | |
| 2187 // The successor must be the required match, if there is a match at all. | |
| 2188 // (Use a fixed radix to avoid expensive affine pointer arithmetic.) | |
| 2189 PcDesc* lower = scopes_pcs_begin(); | |
| 2190 PcDesc* upper = scopes_pcs_end(); | |
| 2191 upper -= 1; // exclude final sentinel | |
| 2192 if (lower >= upper) return NULL; // native method; no PcDescs at all | |
| 2193 | |
| 2194 #define assert_LU_OK \ | |
| 2195 /* invariant on lower..upper during the following search: */ \ | |
| 2196 assert(lower->pc_offset() < pc_offset, "sanity"); \ | |
| 2197 assert(upper->pc_offset() >= pc_offset, "sanity") | |
| 2198 assert_LU_OK; | |
| 2199 | |
| 2200 // Use the last successful return as a split point. | |
| 2201 PcDesc* mid = _pc_desc_cache.last_pc_desc(); | |
| 2202 NOT_PRODUCT(++nmethod_stats.pc_desc_searches); | |
| 2203 if (mid->pc_offset() < pc_offset) { | |
| 2204 lower = mid; | |
| 2205 } else { | |
| 2206 upper = mid; | |
| 2207 } | |
| 2208 | |
| 2209 // Take giant steps at first (4096, then 256, then 16, then 1) | |
| 2210 const int LOG2_RADIX = 4 /*smaller steps in debug mode:*/ debug_only(-1); | |
| 2211 const int RADIX = (1 << LOG2_RADIX); | |
| 2212 for (int step = (1 << (LOG2_RADIX*3)); step > 1; step >>= LOG2_RADIX) { | |
| 2213 while ((mid = lower + step) < upper) { | |
| 2214 assert_LU_OK; | |
| 2215 NOT_PRODUCT(++nmethod_stats.pc_desc_searches); | |
| 2216 if (mid->pc_offset() < pc_offset) { | |
| 2217 lower = mid; | |
| 2218 } else { | |
| 2219 upper = mid; | |
| 2220 break; | |
| 2221 } | |
| 2222 } | |
| 2223 assert_LU_OK; | |
| 2224 } | |
| 2225 | |
| 2226 // Sneak up on the value with a linear search of length ~16. | |
| 2227 while (true) { | |
| 2228 assert_LU_OK; | |
| 2229 mid = lower + 1; | |
| 2230 NOT_PRODUCT(++nmethod_stats.pc_desc_searches); | |
| 2231 if (mid->pc_offset() < pc_offset) { | |
| 2232 lower = mid; | |
| 2233 } else { | |
| 2234 upper = mid; | |
| 2235 break; | |
| 2236 } | |
| 2237 } | |
| 2238 #undef assert_LU_OK | |
| 2239 | |
| 2240 if (match_desc(upper, pc_offset, approximate)) { | |
| 2241 assert(upper == linear_search(this, pc_offset, approximate), "search ok"); | |
| 2242 _pc_desc_cache.add_pc_desc(upper); | |
| 2243 return upper; | |
| 2244 } else { | |
| 2245 assert(NULL == linear_search(this, pc_offset, approximate), "search ok"); | |
| 2246 return NULL; | |
| 2247 } | |
| 2248 } | |
| 2249 | |
| 2250 | |
| 2251 bool nmethod::check_all_dependencies() { | |
| 2252 bool found_check = false; | |
| 2253 // wholesale check of all dependencies | |
| 2254 for (Dependencies::DepStream deps(this); deps.next(); ) { | |
| 2255 if (deps.check_dependency() != NULL) { | |
| 2256 found_check = true; | |
| 2257 NOT_DEBUG(break); | |
| 2258 } | |
| 2259 } | |
| 2260 return found_check; // tell caller if we found anything | |
| 2261 } | |
| 2262 | |
| 2263 bool nmethod::check_dependency_on(DepChange& changes) { | |
| 2264 // What has happened: | |
| 2265 // 1) a new class dependee has been added | |
| 2266 // 2) dependee and all its super classes have been marked | |
| 2267 bool found_check = false; // set true if we are upset | |
| 2268 for (Dependencies::DepStream deps(this); deps.next(); ) { | |
| 2269 // Evaluate only relevant dependencies. | |
| 2270 if (deps.spot_check_dependency_at(changes) != NULL) { | |
| 2271 found_check = true; | |
| 2272 NOT_DEBUG(break); | |
| 2273 } | |
| 2274 } | |
| 2275 return found_check; | |
| 2276 } | |
| 2277 | |
| 2278 bool nmethod::is_evol_dependent_on(Klass* dependee) { | |
| 2279 InstanceKlass *dependee_ik = InstanceKlass::cast(dependee); | |
| 2280 Array<Method*>* dependee_methods = dependee_ik->methods(); | |
| 2281 for (Dependencies::DepStream deps(this); deps.next(); ) { | |
| 2282 if (deps.type() == Dependencies::evol_method) { | |
| 2283 Method* method = deps.method_argument(0); | |
| 2284 for (int j = 0; j < dependee_methods->length(); j++) { | |
| 2285 if (dependee_methods->at(j) == method) { | |
| 2286 // RC_TRACE macro has an embedded ResourceMark | |
| 2287 RC_TRACE(0x01000000, | |
| 2288 ("Found evol dependency of nmethod %s.%s(%s) compile_id=%d on method %s.%s(%s)", | |
| 2289 _method->method_holder()->external_name(), | |
| 2290 _method->name()->as_C_string(), | |
| 2291 _method->signature()->as_C_string(), compile_id(), | |
| 2292 method->method_holder()->external_name(), | |
| 2293 method->name()->as_C_string(), | |
| 2294 method->signature()->as_C_string())); | |
| 2295 if (TraceDependencies || LogCompilation) | |
| 2296 deps.log_dependency(dependee); | |
| 2297 return true; | |
| 2298 } | |
| 2299 } | |
| 2300 } | |
| 2301 } | |
| 2302 return false; | |
| 2303 } | |
| 2304 | |
| 2305 // Called from mark_for_deoptimization, when dependee is invalidated. | |
| 2306 bool nmethod::is_dependent_on_method(Method* dependee) { | |
| 2307 for (Dependencies::DepStream deps(this); deps.next(); ) { | |
| 2308 if (deps.type() != Dependencies::evol_method) | |
| 2309 continue; | |
| 2310 Method* method = deps.method_argument(0); | |
| 2311 if (method == dependee) return true; | |
| 2312 } | |
| 2313 return false; | |
| 2314 } | |
| 2315 | |
| 2316 | |
| 2317 bool nmethod::is_patchable_at(address instr_addr) { | |
| 2318 assert(insts_contains(instr_addr), "wrong nmethod used"); | |
| 2319 if (is_zombie()) { | |
| 2320 // a zombie may never be patched | |
| 2321 return false; | |
| 2322 } | |
| 2323 return true; | |
| 2324 } | |
| 2325 | |
| 2326 | |
| 2327 address nmethod::continuation_for_implicit_exception(address pc) { | |
| 2328 // Exception happened outside inline-cache check code => we are inside | |
| 2329 // an active nmethod => use cpc to determine a return address | |
| 2330 int exception_offset = pc - code_begin(); | |
| 2331 int cont_offset = ImplicitExceptionTable(this).at( exception_offset ); | |
| 2332 #ifdef ASSERT | |
| 2333 if (cont_offset == 0) { | |
| 2334 Thread* thread = ThreadLocalStorage::get_thread_slow(); | |
| 2335 ResetNoHandleMark rnm; // Might be called from LEAF/QUICK ENTRY | |
| 2336 HandleMark hm(thread); | |
| 2337 ResourceMark rm(thread); | |
| 2338 CodeBlob* cb = CodeCache::find_blob(pc); | |
| 2339 assert(cb != NULL && cb == this, ""); | |
| 2340 tty->print_cr("implicit exception happened at " INTPTR_FORMAT, pc); | |
| 2341 print(); | |
| 2342 method()->print_codes(); | |
| 2343 print_code(); | |
| 2344 print_pcs(); | |
| 2345 } | |
| 2346 #endif | |
| 2347 if (cont_offset == 0) { | |
| 2348 // Let the normal error handling report the exception | |
| 2349 return NULL; | |
| 2350 } | |
| 2351 return code_begin() + cont_offset; | |
| 2352 } | |
| 2353 | |
| 2354 | |
| 2355 | |
| 2356 void nmethod_init() { | |
| 2357 // make sure you didn't forget to adjust the filler fields | |
| 2358 assert(sizeof(nmethod) % oopSize == 0, "nmethod size must be multiple of a word"); | |
| 2359 } | |
| 2360 | |
| 2361 | |
| 2362 //------------------------------------------------------------------------------------------- | |
| 2363 | |
| 2364 | |
| 2365 // QQQ might we make this work from a frame?? | |
| 2366 nmethodLocker::nmethodLocker(address pc) { | |
| 2367 CodeBlob* cb = CodeCache::find_blob(pc); | |
| 2368 guarantee(cb != NULL && cb->is_nmethod(), "bad pc for a nmethod found"); | |
| 2369 _nm = (nmethod*)cb; | |
| 2370 lock_nmethod(_nm); | |
| 2371 } | |
| 2372 | |
| 2373 // Only JvmtiDeferredEvent::compiled_method_unload_event() | |
| 2374 // should pass zombie_ok == true. | |
| 2375 void nmethodLocker::lock_nmethod(nmethod* nm, bool zombie_ok) { | |
| 2376 if (nm == NULL) return; | |
| 2377 Atomic::inc(&nm->_lock_count); | |
| 2378 guarantee(zombie_ok || !nm->is_zombie(), "cannot lock a zombie method"); | |
| 2379 } | |
| 2380 | |
| 2381 void nmethodLocker::unlock_nmethod(nmethod* nm) { | |
| 2382 if (nm == NULL) return; | |
| 2383 Atomic::dec(&nm->_lock_count); | |
| 2384 guarantee(nm->_lock_count >= 0, "unmatched nmethod lock/unlock"); | |
| 2385 } | |
| 2386 | |
| 2387 | |
| 2388 // ----------------------------------------------------------------------------- | |
| 2389 // nmethod::get_deopt_original_pc | |
| 2390 // | |
| 2391 // Return the original PC for the given PC if: | |
| 2392 // (a) the given PC belongs to a nmethod and | |
| 2393 // (b) it is a deopt PC | |
| 2394 address nmethod::get_deopt_original_pc(const frame* fr) { | |
| 2395 if (fr->cb() == NULL) return NULL; | |
| 2396 | |
| 2397 nmethod* nm = fr->cb()->as_nmethod_or_null(); | |
| 2398 if (nm != NULL && nm->is_deopt_pc(fr->pc())) | |
| 2399 return nm->get_original_pc(fr); | |
| 2400 | |
| 2401 return NULL; | |
| 2402 } | |
| 2403 | |
| 2404 | |
| 2405 // ----------------------------------------------------------------------------- | |
| 2406 // MethodHandle | |
| 2407 | |
| 2408 bool nmethod::is_method_handle_return(address return_pc) { | |
| 2409 if (!has_method_handle_invokes()) return false; | |
| 2410 PcDesc* pd = pc_desc_at(return_pc); | |
| 2411 if (pd == NULL) | |
| 2412 return false; | |
| 2413 return pd->is_method_handle_invoke(); | |
| 2414 } | |
| 2415 | |
| 2416 | |
| 2417 // ----------------------------------------------------------------------------- | |
| 2418 // Verification | |
| 2419 | |
| 2420 class VerifyOopsClosure: public OopClosure { | |
| 2421 nmethod* _nm; | |
| 2422 bool _ok; | |
| 2423 public: | |
| 2424 VerifyOopsClosure(nmethod* nm) : _nm(nm), _ok(true) { } | |
| 2425 bool ok() { return _ok; } | |
| 2426 virtual void do_oop(oop* p) { | |
| 2427 if ((*p) == NULL || (*p)->is_oop()) return; | |
| 2428 if (_ok) { | |
| 2429 _nm->print_nmethod(true); | |
| 2430 _ok = false; | |
| 2431 } | |
| 2432 tty->print_cr("*** non-oop "PTR_FORMAT" found at "PTR_FORMAT" (offset %d)", | |
| 2433 (intptr_t)(*p), (intptr_t)p, (int)((intptr_t)p - (intptr_t)_nm)); | |
| 2434 } | |
| 2435 virtual void do_oop(narrowOop* p) { ShouldNotReachHere(); } | |
| 2436 }; | |
| 2437 | |
| 2438 void nmethod::verify() { | |
| 2439 | |
| 2440 // Hmm. OSR methods can be deopted but not marked as zombie or not_entrant | |
| 2441 // seems odd. | |
| 2442 | |
| 2443 if( is_zombie() || is_not_entrant() ) | |
| 2444 return; | |
| 2445 | |
| 2446 // Make sure all the entry points are correctly aligned for patching. | |
| 2447 NativeJump::check_verified_entry_alignment(entry_point(), verified_entry_point()); | |
| 2448 | |
| 2449 // assert(method()->is_oop(), "must be valid"); | |
| 2450 | |
| 2451 ResourceMark rm; | |
| 2452 | |
| 2453 if (!CodeCache::contains(this)) { | |
| 2454 fatal(err_msg("nmethod at " INTPTR_FORMAT " not in zone", this)); | |
| 2455 } | |
| 2456 | |
| 2457 if(is_native_method() ) | |
| 2458 return; | |
| 2459 | |
| 2460 nmethod* nm = CodeCache::find_nmethod(verified_entry_point()); | |
| 2461 if (nm != this) { | |
| 2462 fatal(err_msg("findNMethod did not find this nmethod (" INTPTR_FORMAT ")", | |
| 2463 this)); | |
| 2464 } | |
| 2465 | |
| 2466 for (PcDesc* p = scopes_pcs_begin(); p < scopes_pcs_end(); p++) { | |
| 2467 if (! p->verify(this)) { | |
| 2468 tty->print_cr("\t\tin nmethod at " INTPTR_FORMAT " (pcs)", this); | |
| 2469 } | |
| 2470 } | |
| 2471 | |
| 2472 VerifyOopsClosure voc(this); | |
| 2473 oops_do(&voc); | |
| 2474 assert(voc.ok(), "embedded oops must be OK"); | |
| 2475 verify_scavenge_root_oops(); | |
| 2476 | |
| 2477 verify_scopes(); | |
| 2478 } | |
| 2479 | |
| 2480 | |
| 2481 void nmethod::verify_interrupt_point(address call_site) { | |
| 2482 // This code does not work in release mode since | |
| 2483 // owns_lock only is available in debug mode. | |
| 2484 CompiledIC* ic = NULL; | |
| 2485 Thread *cur = Thread::current(); | |
| 2486 if (CompiledIC_lock->owner() == cur || | |
| 2487 ((cur->is_VM_thread() || cur->is_ConcurrentGC_thread()) && | |
| 2488 SafepointSynchronize::is_at_safepoint())) { | |
| 2489 ic = CompiledIC_at(this, call_site); | |
| 2490 CHECK_UNHANDLED_OOPS_ONLY(Thread::current()->clear_unhandled_oops()); | |
| 2491 } else { | |
| 2492 MutexLocker ml_verify (CompiledIC_lock); | |
| 2493 ic = CompiledIC_at(this, call_site); | |
| 2494 } | |
| 2495 | |
| 2496 PcDesc* pd = pc_desc_at(ic->end_of_call()); | |
| 2497 assert(pd != NULL, "PcDesc must exist"); | |
| 2498 for (ScopeDesc* sd = new ScopeDesc(this, pd->scope_decode_offset(), | |
| 2499 pd->obj_decode_offset(), pd->should_reexecute(), pd->rethrow_exception(), | |
| 2500 pd->return_oop()); | |
| 2501 !sd->is_top(); sd = sd->sender()) { | |
| 2502 sd->verify(); | |
| 2503 } | |
| 2504 } | |
| 2505 | |
| 2506 void nmethod::verify_scopes() { | |
| 2507 if( !method() ) return; // Runtime stubs have no scope | |
| 2508 if (method()->is_native()) return; // Ignore stub methods. | |
| 2509 // iterate through all interrupt point | |
| 2510 // and verify the debug information is valid. | |
| 2511 RelocIterator iter((nmethod*)this); | |
| 2512 while (iter.next()) { | |
| 2513 address stub = NULL; | |
| 2514 switch (iter.type()) { | |
| 2515 case relocInfo::virtual_call_type: | |
| 2516 verify_interrupt_point(iter.addr()); | |
| 2517 break; | |
| 2518 case relocInfo::opt_virtual_call_type: | |
| 2519 stub = iter.opt_virtual_call_reloc()->static_stub(); | |
| 2520 verify_interrupt_point(iter.addr()); | |
| 2521 break; | |
| 2522 case relocInfo::static_call_type: | |
| 2523 stub = iter.static_call_reloc()->static_stub(); | |
| 2524 //verify_interrupt_point(iter.addr()); | |
| 2525 break; | |
| 2526 case relocInfo::runtime_call_type: | |
| 2527 address destination = iter.reloc()->value(); | |
| 2528 // Right now there is no way to find out which entries support | |
| 2529 // an interrupt point. It would be nice if we had this | |
| 2530 // information in a table. | |
| 2531 break; | |
| 2532 } | |
| 2533 assert(stub == NULL || stub_contains(stub), "static call stub outside stub section"); | |
| 2534 } | |
| 2535 } | |
| 2536 | |
| 2537 | |
| 2538 // ----------------------------------------------------------------------------- | |
| 2539 // Non-product code | |
| 2540 #ifndef PRODUCT | |
| 2541 | |
| 2542 class DebugScavengeRoot: public OopClosure { | |
| 2543 nmethod* _nm; | |
| 2544 bool _ok; | |
| 2545 public: | |
| 2546 DebugScavengeRoot(nmethod* nm) : _nm(nm), _ok(true) { } | |
| 2547 bool ok() { return _ok; } | |
| 2548 virtual void do_oop(oop* p) { | |
| 2549 if ((*p) == NULL || !(*p)->is_scavengable()) return; | |
| 2550 if (_ok) { | |
| 2551 _nm->print_nmethod(true); | |
| 2552 _ok = false; | |
| 2553 } | |
| 2554 tty->print_cr("*** scavengable oop "PTR_FORMAT" found at "PTR_FORMAT" (offset %d)", | |
| 2555 (intptr_t)(*p), (intptr_t)p, (int)((intptr_t)p - (intptr_t)_nm)); | |
| 2556 (*p)->print(); | |
| 2557 } | |
| 2558 virtual void do_oop(narrowOop* p) { ShouldNotReachHere(); } | |
| 2559 }; | |
| 2560 | |
| 2561 void nmethod::verify_scavenge_root_oops() { | |
| 2562 if (!on_scavenge_root_list()) { | |
| 2563 // Actually look inside, to verify the claim that it's clean. | |
| 2564 DebugScavengeRoot debug_scavenge_root(this); | |
| 2565 oops_do(&debug_scavenge_root); | |
| 2566 if (!debug_scavenge_root.ok()) | |
| 2567 fatal("found an unadvertised bad scavengable oop in the code cache"); | |
| 2568 } | |
| 2569 assert(scavenge_root_not_marked(), ""); | |
| 2570 } | |
| 2571 | |
| 2572 #endif // PRODUCT | |
| 2573 | |
| 2574 // Printing operations | |
| 2575 | |
| 2576 void nmethod::print() const { | |
| 2577 ResourceMark rm; | |
| 2578 ttyLocker ttyl; // keep the following output all in one block | |
| 2579 | |
| 2580 tty->print("Compiled method "); | |
| 2581 | |
| 2582 if (is_compiled_by_c1()) { | |
| 2583 tty->print("(c1) "); | |
| 2584 } else if (is_compiled_by_c2()) { | |
| 2585 tty->print("(c2) "); | |
| 2586 } else if (is_compiled_by_shark()) { | |
| 2587 tty->print("(shark) "); | |
| 2588 } else if (is_compiled_by_graal()) { | |
| 2589 tty->print("(Graal) "); | |
| 2590 } else { | |
| 2591 tty->print("(nm) "); | |
| 2592 } | |
| 2593 | |
| 2594 print_on(tty, NULL); | |
| 2595 | |
| 2596 if (WizardMode) { | |
| 2597 tty->print("((nmethod*) "INTPTR_FORMAT ") ", this); | |
| 2598 tty->print(" for method " INTPTR_FORMAT , (address)method()); | |
| 2599 tty->print(" { "); | |
| 2600 if (is_in_use()) tty->print("in_use "); | |
| 2601 if (is_not_entrant()) tty->print("not_entrant "); | |
| 2602 if (is_zombie()) tty->print("zombie "); | |
| 2603 if (is_unloaded()) tty->print("unloaded "); | |
| 2604 if (on_scavenge_root_list()) tty->print("scavenge_root "); | |
| 2605 tty->print_cr("}:"); | |
| 2606 } | |
| 2607 if (size () > 0) tty->print_cr(" total in heap [" INTPTR_FORMAT "," INTPTR_FORMAT "] = %d", | |
| 2608 (address)this, | |
| 2609 (address)this + size(), | |
| 2610 size()); | |
| 2611 if (relocation_size () > 0) tty->print_cr(" relocation [" INTPTR_FORMAT "," INTPTR_FORMAT "] = %d", | |
| 2612 relocation_begin(), | |
| 2613 relocation_end(), | |
| 2614 relocation_size()); | |
| 2615 if (consts_size () > 0) tty->print_cr(" constants [" INTPTR_FORMAT "," INTPTR_FORMAT "] = %d", | |
| 2616 consts_begin(), | |
| 2617 consts_end(), | |
| 2618 consts_size()); | |
| 2619 if (insts_size () > 0) tty->print_cr(" main code [" INTPTR_FORMAT "," INTPTR_FORMAT "] = %d", | |
| 2620 insts_begin(), | |
| 2621 insts_end(), | |
| 2622 insts_size()); | |
| 2623 if (stub_size () > 0) tty->print_cr(" stub code [" INTPTR_FORMAT "," INTPTR_FORMAT "] = %d", | |
| 2624 stub_begin(), | |
| 2625 stub_end(), | |
| 2626 stub_size()); | |
| 2627 if (oops_size () > 0) tty->print_cr(" oops [" INTPTR_FORMAT "," INTPTR_FORMAT "] = %d", | |
| 2628 oops_begin(), | |
| 2629 oops_end(), | |
| 2630 oops_size()); | |
| 2631 if (metadata_size () > 0) tty->print_cr(" metadata [" INTPTR_FORMAT "," INTPTR_FORMAT "] = %d", | |
| 2632 metadata_begin(), | |
| 2633 metadata_end(), | |
| 2634 metadata_size()); | |
| 2635 if (scopes_data_size () > 0) tty->print_cr(" scopes data [" INTPTR_FORMAT "," INTPTR_FORMAT "] = %d", | |
| 2636 scopes_data_begin(), | |
| 2637 scopes_data_end(), | |
| 2638 scopes_data_size()); | |
| 2639 if (scopes_pcs_size () > 0) tty->print_cr(" scopes pcs [" INTPTR_FORMAT "," INTPTR_FORMAT "] = %d", | |
| 2640 scopes_pcs_begin(), | |
| 2641 scopes_pcs_end(), | |
| 2642 scopes_pcs_size()); | |
| 2643 if (dependencies_size () > 0) tty->print_cr(" dependencies [" INTPTR_FORMAT "," INTPTR_FORMAT "] = %d", | |
| 2644 dependencies_begin(), | |
| 2645 dependencies_end(), | |
| 2646 dependencies_size()); | |
| 2647 if (handler_table_size() > 0) tty->print_cr(" handler table [" INTPTR_FORMAT "," INTPTR_FORMAT "] = %d", | |
| 2648 handler_table_begin(), | |
| 2649 handler_table_end(), | |
| 2650 handler_table_size()); | |
| 2651 if (nul_chk_table_size() > 0) tty->print_cr(" nul chk table [" INTPTR_FORMAT "," INTPTR_FORMAT "] = %d", | |
| 2652 nul_chk_table_begin(), | |
| 2653 nul_chk_table_end(), | |
| 2654 nul_chk_table_size()); | |
| 2655 } | |
| 2656 | |
| 2657 void nmethod::print_code() { | |
| 2658 HandleMark hm; | |
| 2659 ResourceMark m; | |
| 2660 Disassembler::decode(this); | |
| 2661 } | |
| 2662 | |
| 2663 | |
| 2664 #ifndef PRODUCT | |
| 2665 | |
| 2666 void nmethod::print_scopes() { | |
| 2667 // Find the first pc desc for all scopes in the code and print it. | |
| 2668 ResourceMark rm; | |
| 2669 for (PcDesc* p = scopes_pcs_begin(); p < scopes_pcs_end(); p++) { | |
| 2670 if (p->scope_decode_offset() == DebugInformationRecorder::serialized_null) | |
| 2671 continue; | |
| 2672 | |
| 2673 ScopeDesc* sd = scope_desc_at(p->real_pc(this)); | |
| 2674 sd->print_on(tty, p); | |
| 2675 } | |
| 2676 } | |
| 2677 | |
| 2678 void nmethod::print_dependencies() { | |
| 2679 ResourceMark rm; | |
| 2680 ttyLocker ttyl; // keep the following output all in one block | |
| 2681 tty->print_cr("Dependencies:"); | |
| 2682 for (Dependencies::DepStream deps(this); deps.next(); ) { | |
| 2683 deps.print_dependency(); | |
| 2684 Klass* ctxk = deps.context_type(); | |
| 2685 if (ctxk != NULL) { | |
| 2686 if (ctxk->oop_is_instance() && ((InstanceKlass*)ctxk)->is_dependent_nmethod(this)) { | |
| 2687 tty->print_cr(" [nmethod<=klass]%s", ctxk->external_name()); | |
| 2688 } | |
| 2689 } | |
| 2690 deps.log_dependency(); // put it into the xml log also | |
| 2691 } | |
| 2692 } | |
| 2693 | |
| 2694 | |
| 2695 void nmethod::print_relocations() { | |
| 2696 ResourceMark m; // in case methods get printed via the debugger | |
| 2697 tty->print_cr("relocations:"); | |
| 2698 RelocIterator iter(this); | |
| 2699 iter.print(); | |
| 2700 if (UseRelocIndex) { | |
| 2701 jint* index_end = (jint*)relocation_end() - 1; | |
| 2702 jint index_size = *index_end; | |
| 2703 jint* index_start = (jint*)( (address)index_end - index_size ); | |
| 2704 tty->print_cr(" index @" INTPTR_FORMAT ": index_size=%d", index_start, index_size); | |
| 2705 if (index_size > 0) { | |
| 2706 jint* ip; | |
| 2707 for (ip = index_start; ip+2 <= index_end; ip += 2) | |
| 2708 tty->print_cr(" (%d %d) addr=" INTPTR_FORMAT " @" INTPTR_FORMAT, | |
| 2709 ip[0], | |
| 2710 ip[1], | |
| 2711 header_end()+ip[0], | |
| 2712 relocation_begin()-1+ip[1]); | |
| 2713 for (; ip < index_end; ip++) | |
| 2714 tty->print_cr(" (%d ?)", ip[0]); | |
| 2715 tty->print_cr(" @" INTPTR_FORMAT ": index_size=%d", ip, *ip++); | |
| 2716 tty->print_cr("reloc_end @" INTPTR_FORMAT ":", ip); | |
| 2717 } | |
| 2718 } | |
| 2719 } | |
| 2720 | |
| 2721 | |
| 2722 void nmethod::print_pcs() { | |
| 2723 ResourceMark m; // in case methods get printed via debugger | |
| 2724 tty->print_cr("pc-bytecode offsets:"); | |
| 2725 for (PcDesc* p = scopes_pcs_begin(); p < scopes_pcs_end(); p++) { | |
| 2726 p->print(this); | |
| 2727 } | |
| 2728 } | |
| 2729 | |
| 2730 #endif // PRODUCT | |
| 2731 | |
| 2732 const char* nmethod::reloc_string_for(u_char* begin, u_char* end) { | |
| 2733 RelocIterator iter(this, begin, end); | |
| 2734 bool have_one = false; | |
| 2735 while (iter.next()) { | |
| 2736 have_one = true; | |
| 2737 switch (iter.type()) { | |
| 2738 case relocInfo::none: return "no_reloc"; | |
| 2739 case relocInfo::oop_type: { | |
| 2740 stringStream st; | |
| 2741 oop_Relocation* r = iter.oop_reloc(); | |
| 2742 oop obj = r->oop_value(); | |
| 2743 st.print("oop("); | |
| 2744 if (obj == NULL) st.print("NULL"); | |
| 2745 else obj->print_value_on(&st); | |
| 2746 st.print(")"); | |
| 2747 return st.as_string(); | |
| 2748 } | |
| 2749 case relocInfo::metadata_type: { | |
| 2750 stringStream st; | |
| 2751 metadata_Relocation* r = iter.metadata_reloc(); | |
| 2752 Metadata* obj = r->metadata_value(); | |
| 2753 st.print("metadata("); | |
| 2754 if (obj == NULL) st.print("NULL"); | |
| 2755 else obj->print_value_on(&st); | |
| 2756 st.print(")"); | |
| 2757 return st.as_string(); | |
| 2758 } | |
| 2759 case relocInfo::virtual_call_type: return "virtual_call"; | |
| 2760 case relocInfo::opt_virtual_call_type: return "optimized virtual_call"; | |
| 2761 case relocInfo::static_call_type: return "static_call"; | |
| 2762 case relocInfo::static_stub_type: return "static_stub"; | |
| 2763 case relocInfo::runtime_call_type: return "runtime_call"; | |
| 2764 case relocInfo::external_word_type: return "external_word"; | |
| 2765 case relocInfo::internal_word_type: return "internal_word"; | |
| 2766 case relocInfo::section_word_type: return "section_word"; | |
| 2767 case relocInfo::poll_type: return "poll"; | |
| 2768 case relocInfo::poll_return_type: return "poll_return"; | |
| 2769 case relocInfo::type_mask: return "type_bit_mask"; | |
| 2770 } | |
| 2771 } | |
| 2772 return have_one ? "other" : NULL; | |
| 2773 } | |
| 2774 | |
| 2775 // Return a the last scope in (begin..end] | |
| 2776 ScopeDesc* nmethod::scope_desc_in(address begin, address end) { | |
| 2777 PcDesc* p = pc_desc_near(begin+1); | |
| 2778 if (p != NULL && p->real_pc(this) <= end) { | |
| 2779 return new ScopeDesc(this, p->scope_decode_offset(), | |
| 2780 p->obj_decode_offset(), p->should_reexecute(), p->rethrow_exception(), | |
| 2781 p->return_oop()); | |
| 2782 } | |
| 2783 return NULL; | |
| 2784 } | |
| 2785 | |
| 2786 void nmethod::print_nmethod_labels(outputStream* stream, address block_begin) const { | |
| 2787 if (block_begin == entry_point()) stream->print_cr("[Entry Point]"); | |
| 2788 if (block_begin == verified_entry_point()) stream->print_cr("[Verified Entry Point]"); | |
| 2789 if (GRAAL_ONLY(_exception_offset >= 0 &&) block_begin == exception_begin()) stream->print_cr("[Exception Handler]"); | |
| 2790 if (block_begin == stub_begin()) stream->print_cr("[Stub Code]"); | |
| 2791 if (GRAAL_ONLY(_deoptimize_offset >= 0 &&) block_begin == deopt_handler_begin()) stream->print_cr("[Deopt Handler Code]"); | |
| 2792 | |
| 2793 if (has_method_handle_invokes()) | |
| 2794 if (block_begin == deopt_mh_handler_begin()) stream->print_cr("[Deopt MH Handler Code]"); | |
| 2795 | |
| 2796 if (block_begin == consts_begin()) stream->print_cr("[Constants]"); | |
| 2797 | |
| 2798 if (block_begin == entry_point()) { | |
| 2799 methodHandle m = method(); | |
| 2800 if (m.not_null()) { | |
| 2801 stream->print(" # "); | |
| 2802 m->print_value_on(stream); | |
| 2803 stream->cr(); | |
| 2804 } | |
| 2805 if (m.not_null() && !is_osr_method()) { | |
| 2806 ResourceMark rm; | |
| 2807 int sizeargs = m->size_of_parameters(); | |
| 2808 BasicType* sig_bt = NEW_RESOURCE_ARRAY(BasicType, sizeargs); | |
| 2809 VMRegPair* regs = NEW_RESOURCE_ARRAY(VMRegPair, sizeargs); | |
| 2810 { | |
| 2811 int sig_index = 0; | |
| 2812 if (!m->is_static()) | |
| 2813 sig_bt[sig_index++] = T_OBJECT; // 'this' | |
| 2814 for (SignatureStream ss(m->signature()); !ss.at_return_type(); ss.next()) { | |
| 2815 BasicType t = ss.type(); | |
| 2816 sig_bt[sig_index++] = t; | |
| 2817 if (type2size[t] == 2) { | |
| 2818 sig_bt[sig_index++] = T_VOID; | |
| 2819 } else { | |
| 2820 assert(type2size[t] == 1, "size is 1 or 2"); | |
| 2821 } | |
| 2822 } | |
| 2823 assert(sig_index == sizeargs, ""); | |
| 2824 } | |
| 2825 const char* spname = "sp"; // make arch-specific? | |
| 2826 intptr_t out_preserve = SharedRuntime::java_calling_convention(sig_bt, regs, sizeargs, false); | |
| 2827 int stack_slot_offset = this->frame_size() * wordSize; | |
| 2828 int tab1 = 14, tab2 = 24; | |
| 2829 int sig_index = 0; | |
| 2830 int arg_index = (m->is_static() ? 0 : -1); | |
| 2831 bool did_old_sp = false; | |
| 2832 for (SignatureStream ss(m->signature()); !ss.at_return_type(); ) { | |
| 2833 bool at_this = (arg_index == -1); | |
| 2834 bool at_old_sp = false; | |
| 2835 BasicType t = (at_this ? T_OBJECT : ss.type()); | |
| 2836 assert(t == sig_bt[sig_index], "sigs in sync"); | |
| 2837 if (at_this) | |
| 2838 stream->print(" # this: "); | |
| 2839 else | |
| 2840 stream->print(" # parm%d: ", arg_index); | |
| 2841 stream->move_to(tab1); | |
| 2842 VMReg fst = regs[sig_index].first(); | |
| 2843 VMReg snd = regs[sig_index].second(); | |
| 2844 if (fst->is_reg()) { | |
| 2845 stream->print("%s", fst->name()); | |
| 2846 if (snd->is_valid()) { | |
| 2847 stream->print(":%s", snd->name()); | |
| 2848 } | |
| 2849 } else if (fst->is_stack()) { | |
| 2850 int offset = fst->reg2stack() * VMRegImpl::stack_slot_size + stack_slot_offset; | |
| 2851 if (offset == stack_slot_offset) at_old_sp = true; | |
| 2852 stream->print("[%s+0x%x]", spname, offset); | |
| 2853 } else { | |
| 2854 stream->print("reg%d:%d??", (int)(intptr_t)fst, (int)(intptr_t)snd); | |
| 2855 } | |
| 2856 stream->print(" "); | |
| 2857 stream->move_to(tab2); | |
| 2858 stream->print("= "); | |
| 2859 if (at_this) { | |
| 2860 m->method_holder()->print_value_on(stream); | |
| 2861 } else { | |
| 2862 bool did_name = false; | |
| 2863 if (!at_this && ss.is_object()) { | |
| 2864 Symbol* name = ss.as_symbol_or_null(); | |
| 2865 if (name != NULL) { | |
| 2866 name->print_value_on(stream); | |
| 2867 did_name = true; | |
| 2868 } | |
| 2869 } | |
| 2870 if (!did_name) | |
| 2871 stream->print("%s", type2name(t)); | |
| 2872 } | |
| 2873 if (at_old_sp) { | |
| 2874 stream->print(" (%s of caller)", spname); | |
| 2875 did_old_sp = true; | |
| 2876 } | |
| 2877 stream->cr(); | |
| 2878 sig_index += type2size[t]; | |
| 2879 arg_index += 1; | |
| 2880 if (!at_this) ss.next(); | |
| 2881 } | |
| 2882 if (!did_old_sp) { | |
| 2883 stream->print(" # "); | |
| 2884 stream->move_to(tab1); | |
| 2885 stream->print("[%s+0x%x]", spname, stack_slot_offset); | |
| 2886 stream->print(" (%s of caller)", spname); | |
| 2887 stream->cr(); | |
| 2888 } | |
| 2889 } | |
| 2890 } | |
| 2891 } | |
| 2892 | |
| 2893 void nmethod::print_code_comment_on(outputStream* st, int column, u_char* begin, u_char* end) { | |
| 2894 // First, find an oopmap in (begin, end]. | |
| 2895 // We use the odd half-closed interval so that oop maps and scope descs | |
| 2896 // which are tied to the byte after a call are printed with the call itself. | |
| 2897 address base = code_begin(); | |
| 2898 OopMapSet* oms = oop_maps(); | |
| 2899 if (oms != NULL) { | |
| 2900 for (int i = 0, imax = oms->size(); i < imax; i++) { | |
| 2901 OopMap* om = oms->at(i); | |
| 2902 address pc = base + om->offset(); | |
| 2903 if (pc > begin) { | |
| 2904 if (pc <= end) { | |
| 2905 st->move_to(column); | |
| 2906 st->print("; "); | |
| 2907 om->print_on(st); | |
| 2908 } | |
| 2909 break; | |
| 2910 } | |
| 2911 } | |
| 2912 } | |
| 2913 | |
| 2914 // Print any debug info present at this pc. | |
| 2915 ScopeDesc* sd = scope_desc_in(begin, end); | |
| 2916 if (sd != NULL) { | |
| 2917 st->move_to(column); | |
| 2918 if (sd->bci() == SynchronizationEntryBCI) { | |
| 2919 st->print(";*synchronization entry"); | |
| 2920 } else { | |
| 2921 if (sd->method() == NULL) { | |
| 2922 st->print("method is NULL"); | |
| 2923 } else if (sd->method()->is_native()) { | |
| 2924 st->print("method is native"); | |
| 2925 } else { | |
| 2926 Bytecodes::Code bc = sd->method()->java_code_at(sd->bci()); | |
| 2927 st->print(";*%s", Bytecodes::name(bc)); | |
| 2928 switch (bc) { | |
| 2929 case Bytecodes::_invokevirtual: | |
| 2930 case Bytecodes::_invokespecial: | |
| 2931 case Bytecodes::_invokestatic: | |
| 2932 case Bytecodes::_invokeinterface: | |
| 2933 { | |
| 2934 Bytecode_invoke invoke(sd->method(), sd->bci()); | |
| 2935 st->print(" "); | |
| 2936 if (invoke.name() != NULL) | |
| 2937 invoke.name()->print_symbol_on(st); | |
| 2938 else | |
| 2939 st->print("<UNKNOWN>"); | |
| 2940 break; | |
| 2941 } | |
| 2942 case Bytecodes::_getfield: | |
| 2943 case Bytecodes::_putfield: | |
| 2944 case Bytecodes::_getstatic: | |
| 2945 case Bytecodes::_putstatic: | |
| 2946 { | |
| 2947 Bytecode_field field(sd->method(), sd->bci()); | |
| 2948 st->print(" "); | |
| 2949 if (field.name() != NULL) | |
| 2950 field.name()->print_symbol_on(st); | |
| 2951 else | |
| 2952 st->print("<UNKNOWN>"); | |
| 2953 } | |
| 2954 } | |
| 2955 } | |
| 2956 } | |
| 2957 | |
| 2958 // Print all scopes | |
| 2959 for (;sd != NULL; sd = sd->sender()) { | |
| 2960 st->move_to(column); | |
| 2961 st->print("; -"); | |
| 2962 if (sd->method() == NULL) { | |
| 2963 st->print("method is NULL"); | |
| 2964 } else { | |
| 2965 sd->method()->print_short_name(st); | |
| 2966 } | |
| 2967 int lineno = sd->method()->line_number_from_bci(sd->bci()); | |
| 2968 if (lineno != -1) { | |
| 2969 st->print("@%d (line %d)", sd->bci(), lineno); | |
| 2970 } else { | |
| 2971 st->print("@%d", sd->bci()); | |
| 2972 } | |
| 2973 st->cr(); | |
| 2974 } | |
| 2975 } | |
| 2976 | |
| 2977 // Print relocation information | |
| 2978 const char* str = reloc_string_for(begin, end); | |
| 2979 if (str != NULL) { | |
| 2980 if (sd != NULL) st->cr(); | |
| 2981 st->move_to(column); | |
| 2982 st->print("; {%s}", str); | |
| 2983 } | |
| 2984 int cont_offset = ImplicitExceptionTable(this).at(begin - code_begin()); | |
| 2985 if (cont_offset != 0) { | |
| 2986 st->move_to(column); | |
| 2987 st->print("; implicit exception: dispatches to " INTPTR_FORMAT, code_begin() + cont_offset); | |
| 2988 } | |
| 2989 | |
| 2990 } | |
| 2991 | |
| 2992 #ifndef PRODUCT | |
| 2993 | |
| 2994 void nmethod::print_value_on(outputStream* st) const { | |
| 2995 st->print("nmethod"); | |
| 2996 print_on(st, NULL); | |
| 2997 } | |
| 2998 | |
| 2999 void nmethod::print_calls(outputStream* st) { | |
| 3000 RelocIterator iter(this); | |
| 3001 while (iter.next()) { | |
| 3002 switch (iter.type()) { | |
| 3003 case relocInfo::virtual_call_type: | |
| 3004 case relocInfo::opt_virtual_call_type: { | |
| 3005 VerifyMutexLocker mc(CompiledIC_lock); | |
| 3006 CompiledIC_at(iter.reloc())->print(); | |
| 3007 break; | |
| 3008 } | |
| 3009 case relocInfo::static_call_type: | |
| 3010 st->print_cr("Static call at " INTPTR_FORMAT, iter.reloc()->addr()); | |
| 3011 compiledStaticCall_at(iter.reloc())->print(); | |
| 3012 break; | |
| 3013 } | |
| 3014 } | |
| 3015 } | |
| 3016 | |
| 3017 void nmethod::print_handler_table() { | |
| 3018 ExceptionHandlerTable(this).print(); | |
| 3019 } | |
| 3020 | |
| 3021 void nmethod::print_nul_chk_table() { | |
| 3022 ImplicitExceptionTable(this).print(code_begin()); | |
| 3023 } | |
| 3024 | |
| 3025 #endif // PRODUCT | |
| 3026 | |
| 3027 void nmethod::print_statistics() { | |
| 3028 ttyLocker ttyl; | |
| 3029 if (xtty != NULL) xtty->head("statistics type='nmethod'"); | |
| 3030 nmethod_stats.print_native_nmethod_stats(); | |
| 3031 nmethod_stats.print_nmethod_stats(); | |
| 3032 DebugInformationRecorder::print_statistics(); | |
| 3033 nmethod_stats.print_pc_stats(); | |
| 3034 Dependencies::print_statistics(); | |
| 3035 if (xtty != NULL) xtty->tail("statistics"); | |
| 3036 } |